3 ms·
This is your annual reminder that The Big Bang is just one of many valid cosmological models.
by superb-owl 4y ago
This is your annual reminder that The Big Bang is just one of many valid cosmological models.
- roywiggins 4y agoWait, which models don't envisage a period where everything is hot enough to unify the fundamental forces? If that happened, you need some mechanism to let the universe cool off without producing these kinks...
- superb-owl 4y agoI'm under the impression you know more about the subject than I do :) I'm mostly replaying what I learned in Penrose's Road to Reality...it's possible that _all_ current cosmological theories predict "cracks," though given the sheer number of models out there, that would surprise me.
- roywiggins 4y agoI'm certainly a layman. But it seems that the predicted strings are supposed to have been caused by the hot-dense early universe cooling off in a particular way, rather than anything to do with how the hot-dense state happened. So it's not clear that making the universe cyclic helps you solve the problem. A much simpler solution would be just that the behavior of the early universe somehow prevented them forming or made them much rarer than we thought.