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RE: Freezing-in and freezing-out dark matter
The interested reader might also want to become an interested viewer of some mind-boggling facts about dark matter by visiting the following YouTube channel:
I've watched almost all of his videos. I recommend spending some time browsing through his videos. One of my favorites, though not related to this post, is about him explaining how the universe is much larger than we think it is.
I don't have the time to watch the videos (I rarely watch any video at all). I am the kind of person who prefers reading :)
Concerning this topic: dark matter is not antimatter and has never been produced (we are still at the level of trying to detect it). You are probably confused between both of these.
Is it? The (observable I suppose) universe has the size we calculated it has, no?
Sorry! You're right. I did confuse the two. I'm kind of like you because I do prefer reading to watching videos. However, this is one of those very few YouTube channels that I do actually watch sometimes.
The universe is much larger than the human mind can comprehend. For example, I think I remember one of my professors telling me that something to the order of 10^40 is more than however many atoms that we have in the universe. The human mind cannot fathom such things. That's what I think they're trying to convey.
Ah ok. There are indeed things we feel being like this or that. The universe may be one of these. However, feeling is different from having an actual theory and making predictions.
In fact, to rephrase it, our own feelings are by no way any scientific proof. It is not because we feel that something is like this or that, that it is actually like this or that :)