Interna

I’m still writing on the book. After not much happened for almost a year, my publisher now rather suddenly asked for the final version of the manuscript. Until that’s done not much will be happening on this blog.

We do seem to have settled on a title though: “Lost in Math: How Beauty Leads Physics Astray.” The title is my doing, the subtitle isn’t. I just hope it won’t lead too many readers astray.

The book is supposed to be published in the USA/Canada by Basic Books next year in the Spring, and in Germany by Fischer half a year later. I’ll tell you more about the content at some point but right now I’m pretty sick of the whole book-thing.

In the meantime I have edited another book, this one on “Experimental Search for Quantum Gravity” which you can now preoder on amazon. It’s a, probably rather hard to digest, collection of essays about topics covered at a conference I organized last year. I merely wrote the preface.

Yesterday the twins had their first day in school. As is unfortunately still common in Germany, classes go only until noon. And so, we’re now trying a new arrangement to keep the kids occupied throughout the working day.

Away Note

I'm in Switzerland this week, for a conference on "Thinking about Space and Time: 100 Years of Applying and Interpreting General Relativity." I am also behind with several things and blogging will remain slow for the next weeks. If you miss my writing all too much, here is a new paper.

Away Note

I'm traveling next week and will be offline for some days. Blogging may be insubstantial, if existent, and comments may be stuck in the queue longer than usual. But I'm sure you'll survive without me ;)

And since you haven't seen the girls for a while, here is a recent photo. They'll be starting school this year in the fall and are very excited about it.

Away Note

I’ll be in London for a few days, attending a RAS workshop on “Fine-Tuning on the Cosmological and the Quantum Scales.” First time I’m speaking about the topic, so a little nervous about that.

It just so happens that tomorrow evening there’s a public lecture in London by Roger Penrose which I might or might not attend, depending on whether my flight arrives as planned. Feeling somewhat bad because I haven’t read his recent book. Just judging by the title I’m afraid it might have some overlap with mine.

This public lecture is arranged by the Ideas Roadshow, which I mentioned before. It’s run by Howard Burton, former director of PI. They have some teaser videos which you might enjoy:



Speaking of former directors, I believe Neil Turok’s term at PI is about to run out and I want to complain that I haven’t yet heard rumors who’s in the pipe^^.

As for this blog, please expect that comments might get stuck in the queue longer than usual.

Away Note

I have a trip upcoming to Helsinki. After this I'll be tied up in family business, and then my husband goes on a business trip and I have the kids alone. Then Kindergarten will be closed for a day (forgot why, I'm sure they must have some reason), I have to deal with an ant-infection in our apartment, and more family business follows. In summary: busy times.

I have a book review to appear on this blog later today, but after this you won't hear much from me for a week or two. Keep in mind that since I have comment moderation on, it might take some while for your comment to appear when I am traveling. With thanks for your understanding, here's a random cute pic of Gloria :)

10 Years BackRe(action)

Yes, today marks the 10th anniversary of my first post on this blog.

I started blogging while I was in Santa Barbara, in a tiny fifth-floor office that slightly swayed with the occasional Earthquakes. I meant to write about postdoc-life in California, but ended up instead writing mostly about my research interests. Because, well, that's what I'm interested in. Sorry, California.

Those were the years of the String Wars and of Black Holes at the LHC. And since my writing was on target, traffic to this blog increased rapidly -- a somewhat surprising and occasionally disturbing experience.

Over the years, I repeatedly tried to share the work of regularly feeding this blog, but noticed it's more effort trying to convince others to write than to just write myself. And no, it's not zero effort. In an attempt to improve my Germenglish, I have read Strunk's "Elements of Style" forwards and backwards, along with several books titled "Writing Well" (which were written really well!), and I hope you benefit from it. For me, the outcome has been that now I can't read my older blogposts without crying over my own clumsy writing. Also, there's link-rot. But if you have some tolerance for awkward English and missing images, there's 10 years worth of archives totalling more than 1500 entries waiting in the side-bar.

The content of this blog has slightly changed over the years. Notably, I don't share links here any more. For this, I use instead my twitter and facebook accounts, which you can follow to get reading recommendations and the briefer commentaries. But since I can't stand cluttered pages, this blog is still ad-free and I don't make money with it. So if you like my writing, please have a close look at the donate-button in the top-right corner.

In the 10 years that have passed, this blog moved with me through the time-zones, from California to Canada, from Canada to Sweden, and from Sweden eventually back to Germany. It witnessed my wedding and my pregnancy and my daughters turning from babies to toddlers to Kindergartners. And the journey goes on. As some of you know already, I'm writing a book (or at least I'm supposed to be writing a book), so stay tuned, there's more to come.

I want to thank all of you for reading along, especially the commenters. I know that some of you have been around since the first days, and you have become part of my extended family. You have taught me a lot, about life and about science and about English grammar.

A special thank you goes to those of you who have sent me donations since I put up the button a few months ago. It is a great encouragement for me to continue.

Away Note

I am traveling the next three weeks and things will go very slowly on this blog.

In case you missed it, you might enjoy two pieces I recently wrote for NOVA: Are Singularities Real? and Are Space and Time discrete or continuous? There should be a third one appearing later this month (which will also be the last because it seems they're scraping this column). And then I wrote an article for Quanta Magazine String Theory Meets Loop Quantum Gravity, to which you find some background material here and here. Finally you might find this article in The Independent amusing: Stephen Hawking publishes paper on black holes that could get him 'a Nobel prize after all', in which I'm quoted as the voice of reason.

Tuesday distraction: New music video

When a few weeks ago someone in a waterpark jumped into my left side and cracked a rib, I literally got a crash course in human anatomy. I didn't really appreciate just how often we use our torso muscles, which I was now painfully made aware of with every move. I could neither cough, nor run, nor laugh without wincing. Sneezing was the worst, turning over in bed a nightmare. I also had to notice that one can't sing with a cracked rib. And so, in my most recent song, I've left the vocal track to Ed Witten.


If you want to know more about the history of string theory, I can recommend watching the full lecture, which is both interesting and well delivered.

The rib has almost healed, so please don't expect Ed to become a regular, though he does have an interesting voice.

Away Note

I will be travelling the next weeks, so blogging might be spotty and comment moderation slow. I'll first be in Washington DC speaking at a conference on New Directions in the Foundations of Physics (somewhat ironically after I just decided I've had enough of the foundations of physics). And then I'll be at PI and the University of Waterloo (giving the same talk, with more equations and less philosophy). And, yes, I've packed the camera and I'm trigger happy ;)

Merry Christmas :)

I have a post about "The rising star of science" over at Starts with a Bang. It collects some of my thoughts on science and religion, fear and wonder. I will not repost this here next month, so if you're interested check it out over there. According to medium it's a 6 minutes read. You can get a 3 minutes summary in my recent video:


We wish you all happy holidays :)

From left to right: Inga the elephant, Lara the noisy one, me, Gloria the nosy one, and Bo the moose. Stefan is fine and says hi too, he isn't in the photo because his wife couldn't find the setting for the self-timer.

Away note and Interna

Lara

I'll be traveling the next three weeks, so please be prepared for little or unsubstantial action on this blog. Next week I'm in Reykjavik for a network meeting on "Holographic Methods and Applications". August 27-29 I'm running the Science Writers Workshop in Stockholm together with George, this year on the topic "Quantum Theory." The first week of September then I'm in Trieste for the 2014 conference on Experimental Search for Quantum Gravity, where I'll be speaking about space-time defects.

Unfortunately, this traveling happens just during the time when our Kindergarten is closed, and so it's quite some stress-test for my dear husband. Since you last heard from Lara and Gloria, they have learned to count, use the swing, and are finally potty trained. They can dress themselves, have given up requesting being carried up the stairs, and we mostly get around without taking along the stroller. Yes, life has become much easier. Gloria however still gets motion sick in the car, so we either have to drug her or pull over every 5 minutes. By and large we try to avoid long road trips.

The girls have now more of a social life than me, and we basically can't leave the house without meeting other children that they know and that they have to discuss with whether Friday comes before or after Wednesday. That Lara and Gloria are twins apparently contributes greatly to their popularity. Every once in a while, when I drop off the kids at Kindergarten, some four foot dwarf will request to know if it's really true that they were together in mommy's tummy and inspect me with a skeptic view. The older children tell me that the sisters are so cute, and then try to pad Gloria's head, which she hates.

Gloria

Gloria is still a little ahead of Lara when it comes to developing new skills. She learned to speak a little earlier, to count a little earlier, was potty trained a little earlier and learned to dress herself a little earlier. Then she goes on to explain Lara what to do. She also "reads" books to Lara, basically by memorizing the stories.

Lara on the other hand is still a little ahead in her physical development. She is still a bit taller and more often than not, when I come to pick them up at Kindergarten, Lara will be kicking or throwing some ball while Gloria plays in the sandbox - and afterwards Gloria will insist on taking off her shoes, pouring out the sand and cleaning her socks before she gets into the car. Lara takes off the shoes in the car and pours the sand into the seat pocket. Lara uses her physical advantage over Gloria greatly to take away toys. Gloria takes revenge by telling everybody what Lara did wrong again, like putting her shoe on the wrong foot.

The best recent development is that the girls have finally, after a quite difficult phase, stopped kicking and hitting me and telling me to go away. They now call me "my little mommy" and want me to bake cookies for them. Yes, my popularity has greatly increased with them figuring out that I'm not too bad with cakes and cookies. They don't particularly like my cooking but that's okay, because I don't like it either.

On an entirely different note, as some of you have noticed already, I agreed to write for Ethan Siegel at Starts With A Bang. So far there's two pieces from me over there: How the experiment that claimed to detect dark matter fooled itself and The Smallest Possible Scale in the Universe. The deal is that I can repost what gets published there on this blog after 30 days, which I will do. So if you're only interested in my writing, you're well off here, but check out his site because it's full with interesting physics writing.

Away note

I will be traveling the rest of the week to give a lecture at the Sussex graduate school "From Classical to Quantum GR", so not much will happen on this blog. For the school, we were asked for discussion topics related to our lectures, below are my suggestions. Leave your thoughts in the comments, additional suggestions for topics are also welcome.

• Is it socially responsible to spend money on quantum gravity research? Don't we have better things to do? How could mankind possibly benefit from quantum gravity?
• Can we make any progress on the theory of quantum gravity without connection to experiment? Should we think at all about theories of quantum gravity that do not produce testable predictions? How much time do we grant researchers to come up with predictions?
• What is your favorite approach towards quantum gravity? Why? Should you have a favorite approach at all?
• Is our problem maybe not with the quantization of gravity but with the foundations of quantum mechanics and the process of quantization?
• How plausible is it that gravity remains classical while all the other forces are quantized? Could gravity be neither classical nor quantized?
• How convinced are you that the Planck length is at 10^-33cm? Do you think it is plausible that it is lower? Should we continue looking for it?
• What do you think is the most promising area to look for quantum gravitational effects and why?
• Do you think that gravity can be successfully quantized without paying attention to unification?

Lara and Gloria say hello and wish you a happy Easter :o)

Interna

I’ll be traveling for the rest of the week, so be warned of a period of silence.

Wednesday I’m giving a seminar in Nottingham, and after that I’m attending a workshop in Oxford. The workshop topic is “The Structure of Gravity and Space-time” and it’s part of the project “Establishing the Philosophy of Cosmology”. Sound more ominous than it is: They’ll have a session on the question whether there exists a “fundamental length”, which is what brought me on their invitation list. There will also be sessions on bi-metric gravity, massive gravity and strings and space-time structure, which sounds very promising to me. We’ll see how much philosophy infiltrates the physics. A preliminary program is here.

The girls are doing well, now attending Kindergarten. Our pediatrician didn’t raise any concerns at the 3-year checkup, except for Lara’s vision problems. She’ll get new glasses next week. The ones she has now always slip down and hang on the very tip of her nose, so we hope that the new ones will stay put better.

Lara and Gloria can open and remove all our children safety locks now and I’ve put away the door keys because I’m afraid they’ll lock themselves in. They also picked up lots of swear words since they attend Kindergarten. They don’t really know how to use them properly, which is often unwillingly funny. We’ve made a little progress with the potty training, but unfortunately the kids declare plainly they’re “too lazy” to go without diaper. It is similarly unfortunate that several older children at the Kindergarten still use binkies. Gloria told me the other day she will learn to use the toilet when she can “reach the ceiling”. She also declared that since Gloria came out of mommy’s belly, Lara must have come out of daddy’s belly. Everything far away is “Stockholm” and that’s a magical place where mommy goes and brings back gifts. They’re getting more entertaining by the day.

I finally replaced my old digital camera because some of the buttons were broken, and now have a Canon DSLR (EOS 1100D) which I am so far very happy with, though the learning curve is steep. I used to have a SLR Camera 15 years ago. You know, one of these things were you had to wind back the film and carry it to some store and wait a week just to see how badly you did. Remember that? The DSLR looks and feels quite different from that, as with all the menus that I keep getting lost in. Maybe reading the manual would help. In any case, I spent some weeks hunting after the kids. Below are some of my favorite photos.

Merry Christmas and Happy Holidays

I wish you all happy holidays and a peaceful Christmas time!

The next days will be a slow time on the blog as we're working our way through the holidays, the kid's 3rd birthday, and new year, with all the family and friend's visits that come with it. Back to business next year - enjoy the silence :)

Interna

Mamasonnenbrille.

It’s not like nothing happened, I just haven’t had the time to keep you updated on our four-body problems.

Earlier this year, we had handed over the stalled case on our child benefits to an EU institution called “SOLVIT” that takes on problems with national institutions under EU regulations. Amazingly, they indeed solved our problem efficiently and quickly. And so, after more than two and a half years and an inch of paperwork, Stefan finally gets child benefits. Yoo-hoo! If you have any institutional problem with a family distributed over several EU countries, I can recommend you check out the SOLVIT website. I really wish though the Germans and the Swedes could converge on one paper punch pattern, then I wouldn’t have to keep two different types of folders.

She knows the numbers from
1 to 10, but not their order.

Lara and Gloria will turn 3 in December and so we are about to switch from daycare to Kindergarten. They both speak more or less in full sentences now and come up with questions like "Where do clouds go at night?" and "Mommy, are you wearing underwear?" They still refer to themselves by first name though rather than using “I”, and are struggling with German grammar. At daycare the kids sing a lot, which feeds them weird vocabulary that may be delivered spontaneously in unexpected situations, Butzemann! Tschingderassabum! Wo ist meine Zie-har-mo-ni-ka? The girls both love puzzles and Lego and the wooden railway. On occasion they now demand to sit on their potty, though the timing isn’t quite working yet.

Lara can't let go of the binky, but is
okay as long as it's in the vicinity.

I meanwhile have decided, after a long back and forth, that I’ll not attend next year’s FQXi conference. The primary reason is that I looked up the flight connections and the inconvenience of getting to Vieques Island exceeds my pain tolerance. I am very reluctant these days to attend any meeting that requires me to be away on weekends and that isn’t located in vicinity of a major international airport, thus adding to my travel time. Secondary reason is that I’m not particularly interested in the topic ("The Physics of Information"), and I can just see it degenerating into yet another black hole firewall discussion. At the same time I’m sorry to miss the meeting, because from all the conferences that I’ve attended the FQXi conferences were undoubtedly the most inspiring ones.

Speaking of pain tolerance, I ran a marathon last weekend. I’ve always wondered why people run marathons. Now that I have a finisher medal, I am still wondering why people do this to themselves. I really like running, but there were too many people and too much noise on these 42 km for me.

I admit I plainly didn’t know before my first 10k about a year ago that these races tend to have typically only 20% or so of female participants. (The Frankfurt marathon had 15%, though the recent numbers from the USA look better). I find this surprising given that most of the people I meet jogging in the fields tend to be women. Neither did I know until some months ago that women weren’t even allowed in marathons until the mid 1970s, for somewhat mysterious reasons that seem to go back to the (unpublished) beliefs of some (unnamed) physicians that the female body isn’t meant for long-distance running – a claim that nobody bothered to check until some women stood up and disproved it. It’s an interesting tale, about which you can read here.

In entirely different news, Nordita now spreads word about the wonders of theoretical physics on Twitter and on Facebook. These feeds are fed by Apostolos Vasileiadis, creator of the recently mentioned short film located at Nordita. If you share our love of physics, check it out and I hope we’ll not disappoint.

Also keep in mind this year’s deadline for program proposals is Nov 15. The Stockholm weather can’t compete with Santa Barbara, but I’m told our programs are better funded :o) Instructions for the application can be found on the Nordita homepage.

Interna

Last month I gave a seminar in Bielefeld on models with a minimal length scale. This seminar was part of a series organized within the framework of the new research training group "Models of Quantum Gravity". The initiative is funded by the German Science Foundation (DFG), and several universities in Northern Germany take part in it. I find this a very interesting development. The Germans seem to finally have recognized the need to support research in quantum gravity generally, rather than singling out specific approaches, and this initiative looks promising to me. Let's hope it is fruitful.

My trip to Bielefeld was interesting also in another aspect. When I was about to get on the way back to Heidelberg, the car wouldn't start. After some cursing and fruitless attempts to decode the erratic blinking of the panel lights, I called the closest Renault dealer. (Actually, I first called my husband to yell at him, just because that was the first thing that came to my mind.) The Renault guy said, Guten Tag and tough luck, we'll have to tow the car, but it's five to five now so please call back tomorrow morning.

So I unexpectedly had to spend the night out of town, which I took as an excuse to buy really expensive underwear. They towed the car the next morning, figured out that the battery had died in a short-circuit that blew up some wiring, and I made it back home with 24 hours delay. The irony in this was that I had taken Stefan's car because I was afraid mine would break down and I'd get stranded in Bielefeld.

Tomorrow I'm giving a seminar in Aachen and I hope that this time the car won't break down... Later this month I will try to listen in at a black hole conference in Frankfurt. Unfortunately, this happens to be during the week when our daycare place has summer break, so the logistics is nontrivial. In September I'll be in Helsinki for another seminar. In October I'm on a conference in Vienna. In November I'm attending a workshop in the UK, which for all I can tell doesn't have a webpage and I'm not entirely sure what it is about either.

There's been some discussion in the blogosphere lately about the difficulty of combining the necessary travel to seminars and conferences with family demands. And yeah, what do you expect, it's not easy and it's not fun.

Sometime when I'm writing these Internas about work-family issues, I feel like a case study in the making.

The girls are doing fine and have adjusted well to the new daycare place. So far, we're very happy with it. It's a nice and fairly large place with a playground and much space to run around. They're very well organized and it's not exceedingly costly either.

Some weeks ago the kids were ill, and I called in at the daycare place to say we're not coming. When somebody picked up the phone and I heard a male voice, my first thought was that I must have dialed a wrong number. Needless to say, I then felt bad for my own stereotyping, and that I was apparently surprised the childcare business is not exclusively run by women. If you Google for the job description "Kindererzieher" in German, auto-complete gives you as first hit the female ending of the word.

To be fair to myself though, the guy hadn't been there previously. He was only there as a temporary replacement, and normally a woman called Stephanie would answer the phone. In any case, I later had an interesting conversation with him about gender imbalance in education. His explanation for why there are so few men in his profession was simply that it's badly paid. "You can't feed a family from this." I'm not sure that really explains much though.

Lara and Gloria's vocabulary has exponentially grown in the last month. No day passes without them trying out new words. At this point we actually have to be careful what we tell them because they'll go around and tell everybody who'll listen that the mommycar is broken and will shamelessly repeat my complaints that the neighbors don't separate their garbage. They have meanwhile pretty much taken over the whole apartment. There doesn't seem to be any place that's not occupied with toys or other child paraphernalia. And I, I spend a considerable amount of time collecting building blocks and lego pieces, a genuinely sisyphean activity.

In summary, life is busy.

Bedtime!

Interna

Lara, putting on her shoes.

May 1st is a national holiday both in Sweden and in Germany. A good opportunity, I thought, to update you on our attempts at normal family life.

Lara and Gloria are now talking basically non-stop. Half of the time we have no idea what they are trying to say, the other half are refusals. Gloria literally wakes up in the morning yelling "Nein-nein-nein". Saying it's difficult to get her dressed, fed, and to daycare makes quantizing gravity sound like an easy task. Yesterday she insisted on going in her pajamas. Good mother that I am, I thought that was a brilliant idea.

Gloria is proud of her new hat.

Lara isn't quite as difficult as Gloria, but she is very easily distracted. If I ask her to get into the stroller, she'll first spend five minutes inspecting the stones by the road or take off her shoes and put them back on, just because.Time clearly flows very differently when you're two years old than when you're forty. I try to use the occasions to check my email. Time flows through my iPhone, I'm sure it does.

We finally made progress on our daycare issue, which is presently only half a solution. A new daycare place opened in the area, and due to my time spent on the phone last year, asking people to please write down my name and call me back if the situation unexpectedly changes, somebody indeed recalled my name and we made it top of the list for the new place. So there'll be another adaption phase at another place, but this time it's a full-day care that will indeed cover our working hours. It is also, I should add, considerably less expensive than the present solution with a self-employed nanny. This, I hope, will make my commuting easier for Stefan to cope with.

I'm really excited about the workshop for science writers that I'm organizing with George. We now have an (almost) complete schedule, I've ordered food and drinks and sorted out the lab visit, and I'm very much looking forward to the meeting. Directly after this workshop, I'll attend another workshop in Munich, "Quantum Gravity in Perspective", where I'll be speaking about the phenomenology of quantum gravity. I have some more trips upcoming this summer, to Bielefeld and Aachen and, in fall, to Vienna to speak at a conference on "Emergent Quantum Mechanics."

I was invited to take part in this KITP workshop on black hole firewalls but I eventually decided not to go. Partly because I'm trying to keep my travels limited to not burden Stefan too much with the childcare. But primarily because I don't believe that anything insightful will come out of this debate. It seems to me there are more fruitful research topics to explore, and this discussion is a waste of time. I also never liked SoCal in late summer; too dry for my central-European genes.

Lara and Gloria, eating cookies at a visit to the zoo.

We'll be away for the next couple of days because Stefan's brother is getting married. This means a several-hours long road trip with two toddlers who don't want to sit still for a minute; we're all looking forward to it...

Interna

Lara with her new glasses.

When you last heard from Lara and Gloria, they could utter a few single words. Within a couple of weeks, they have transitioned to speaking full sentences, answer to questions with "yes" and "no", and are very clear in expressing themselves. "Jacke an, Bagger gucke" (Jacket on, watch digger), they might say when they want to go for a walk. They still refer to each other as Gaakie and Gookie though. And they are struggling with German grammar, especially finding the right articles.

Lara now has glasses that are meant to help correct her squinting. She wears them without complaint. It probably helps for her acceptance that I too wear glasses.

The half-day daycare solution is working reasonably well, except that it's prohibitively expensive. The nanny has taught the kids to drink from a cup, to wash their hands, to paint and to jump. I'm sure our downstairs neighbors are as excited about the jumping as the kids. My commuting to Stockholm is not working quite so well. It leaves all of us terribly exhausted and is a huge waste of time, not to mention money. The time that I gain by having the kids in daycare is mostly spent on catching up on life's overhead, paperwork, the household, piles of unread papers and unanswered emails that wait for me upon return.

That having been said, I have a bunch of trips coming up. March 15 I'm in Bergen giving a seminar, apparently on the topic "Siste nytt om kvantegravitasjon". On April 12 I'm in Reykjavik. I haven't been able to find anything resembling a seminar schedule on the department website, but it's the same seminar as in Bergen. In May George and I are running the previously mentioned Workshop for Science Writers in Stockholm, and at the end of May I'll be attending a workshop on "Quantum Gravity in Perspective" in Munich. I have some more trips coming up, but plans haven't proceeded further than that. If you're located in any of these places and feel like  meeting up, send me a note.

Besides this, I've been told that the current issue of the Finnish magazine Tähdet ja avaruus ("Stars and Space") has an article by Laura Koponen about quantum gravity, featuring Renate Loll, Robert Brandenberger, and me. It's in Finnish so I have no clue what it says, but the photos look nice. Though... something about the photo of me didn't feel quite right, and after some forehead frowning it occurred to me that the NorthFace logo on my shirt fell victim to Finnish photoshopping. I actually like it better this way; I prefer my clothes without logos if possible. In any case, should you by any chance speak Finnish and have read the article, let me know what you think.

Interna

January has been busy, as you can probably tell from the frequency of my posts. Lara and Gloria are now in half-daycare for 4 hours weekdays. The transition went fairly well, and I think they like it there. The nanny clearly has more time and patience to play with the kids than I, and the place is also better suited than our apartment where computers, books, pens, and other stuff that you don't want in your toddlers' hands, are lying in every corner. The nanny is from Spain and so the kids learn some Spanish along the way. They seem to understand a few words, but don't yet speak any.

We now replaced the baby cribs with larger beds that the kids can get in and out on their own. This took some getting used to. They wake up in the night now considerably more often than previously, and sometimes wander around, so recently we haven't been getting as much sleep as we would like to. That explains half of my silence. The other big change this month was that, now that the kids are two years old and we have to pay for their flight tickets, we've given up commuting to Stockholm together, and this is the first month of me trying to commute alone. Stefan has support from the babysitter and the grandparents while I'm away, but we're still trying to find the best way to arrange things. It's proved difficult to find a good solution for our issues with non-locality.

I have a case of recurring sinus infection which puts me in a generally grumpy mood, and the kids have a permanently runny nose, for which I partly blame myself and partly the daycare. Besides this, I am in the process of writing a proposal for what the European Research Council calls the "Consolidator Grant" and it's taking up a lot of time I'd rather spend on something else. My review on the minimal length scale got now published in Living Reviews in Relativity. I have been very impressed by how smoothly and well-organized their review and publication process went. Needless to say, now every time I see a paper on the arXiv on a topic covered by the review, I'm dreading the day I have to update this thing.

The girls are finally beginning to actually convey information with what they say. They ask for things they are looking for, they say "mit" (with) to tell us what we should take along, they complain if they're hungry and have learned the all-important word "put" (kaputt, broken). We haven't made much progress with the potty training though, unless naming the diaper content counts.

Happy Birthday Lara and Gloria!

Today our two beautiful girls are two years old! We have two cakes with two candles each and the apartment is full of balloons, awaiting the grandparents for a visit.

During the last year, Lara and Gloria have learned to walk and to run and to jump, to dance and to climb. Since a few weeks, they can climb out of their cribs, so time has come to upgrade the beds. We're browsing the IKEA catalog as I type, so to speak.  In their explorations, they have also suffered the occasional bruise or scratch, but luckily no major injuries. We too have gotten our share of bruises and scratches, mostly due to being hit with toys in a moment of inattentiveness.

For us, this year has been much more work than the first, because for most of the time we couldn't leave the kids unattended for even a second; they would inevitably tear something down, break something, spill something or topple over with the chair. It has gotten better during the last months. They know now fairly well what they can do safely, and they are careful not to touch anything that might be glass. We can let them walk around in the apartment now, so long as we recall to lock away the detergents and knives.

The girls are slow with learning to talk, though our pediatrician says this isn't so uncommon with twins. Gloria refers to herself as "Goo-kie" and to Lara as "Gah-kie" for reasons we don't know. They can now both eat by themselves, though one better doesn't leave them alone with the spaghetti.

When I contemplate the human brain, I am always torn between frustration about its shortcomings and amazement about how well it works. Watching the kids, what astonishes me most is how quickly and flawlessly they learn to identify objects. If you look at some picture book, the drawings are not usually too precise. Yet the kids have no problem to identify items from the books with our household items. And many items, such as most animals or large vehicles, they have never seen in reality, yet if they glimpse as much as a part of a tiger in an illustration, they'll announce "tee-ga". They also find Stefan's and my photos in the tiniest thumbnail versions from among dozens, instantly.

A source of amusement for us is how they construct causal and temporal relations. If they want to watch the washing machine for example, they sometimes pile laundry in front of it, not necessarily laundry that actually needs washing. If I forget to close the blinds for their afternoon nap, they'll scream and point at the window. When I come back from my morning run and the kids are already up, Lara will come and say "Mama. Ouh." and point to the shower. If they want Stefan to read them a book, they'll put a pillow on the floor where he usually sits.

The next year will bring many changes for the kids and for us, not only because of the new beds but also because they will spend more time with other adults and other children. We haven't yet completely solved our daycare problem, but it looks like it will resolve soon. Now it's time to light the candles :o)