tag:blogger.com,1999:blog-22973357.post5056560050839661258..comments2023-09-27T07:44:19.769-04:00Comments on Sabine Hossenfelder: Backreaction: Away NoteSabine Hossenfelderhttp://www.blogger.com/profile/06151209308084588985noreply@blogger.comBlogger3125tag:blogger.com,1999:blog-22973357.post-4747361391194764322017-07-06T06:26:01.464-04:002017-07-06T06:26:01.464-04:00What about primordial black holes? A recent paper...What about primordial black holes? A recent paper by Carr and others shows that not all mass ranges are ruled out.<br />Phillip Helbighttps://www.blogger.com/profile/12067585245603436809noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-63435416048945617372017-07-05T14:10:24.648-04:002017-07-05T14:10:24.648-04:00A new paper purports to rule out all forms of coll...A new paper purports to rule out all forms of collisionless dark matter in a general fashion. https://arxiv.org/abs/1707.01059<br /><br />Taken together with exclusions for self-interacting dark matter, MACHOs, WIMPs, Cold Dark Matter (as opposed to Warm Dark Matter) generally, and strict limitations from accelerators and annihilation searches on Warm Dark Matter parameter space (which pretty andrewhttps://www.blogger.com/profile/08172964121659914379noreply@blogger.comtag:blogger.com,1999:blog-22973357.post-51122283294681340832017-06-30T14:11:27.385-04:002017-06-30T14:11:27.385-04:00Isn't it possible that Universe has a high but...Isn't it possible that Universe has a high but uniform curvature but it is not directly measurable to observers inside of it?<br /><br />Can people of Flatland really measure the curvature of the sphere surface they were living on?<br /><br />Even though sum of the internal angles of a triangle on a spherical surface, would be greater than 180 degrees, are we sure that flatland people could FB36https://www.blogger.com/profile/18166705748528397256noreply@blogger.com