Observable universe
Suppose you're ambitious enough to try to describe everything in the observable universe in one single mathematical equation. DONE. OK, so that doesn't include gravity or a few other...
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Only six hundred million years after the big bang, the universe was in a fog. this is what the universe looked like before any galaxies had formed Here, there are no luminous objects no stars and...
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(Music) On a typical day at school, endless hours are spent learning the answers to questions, but right now, we'll do the opposite. We're going to focus on questions where you...
JAMES GRIME: We love pi, of course. Everyone loves pi. But one of my favorite pi facts is-- and I think it's fun. You only need 39 digits of pi to be able to measure the circumference of the...
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ANTONIO PADILLA: Imagine you had a universe which was a googolplex meters across, OK, so a big universe. Then, that's very big. And if you actually traveled far enough in that universe, you...
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Everyone loves the idea of parallel universes - maybe it's the appeal of an ideal world where you have second chances and things turn out differently - an alternate reality where you do get...
