"A human is halfway in size between an atom and the known universe"... This is a paraphrased quote I have come across several times. I like it. Who said it first? How true is it in the most literal sense? And, finally, what errors arrive in postulating a universe, or an atom, which can be measured AT ALL from our singular, relativistic, perspective? [more inside]
posted by 0bvious on Feb 18, 2007 - 14 answers

What is anti-matter? [more inside]
posted by grumblebee on Sep 26, 2006 - 14 answers

Why did consciousness evolve? [more inside]
posted by 0bvious on Jan 25, 2006 - 39 answers

End of the universe scenarios. I'm familiar with the concepts of "heat death" as well as the universe contracting unto another Big Bang. How else might the universe someday become a completely un-survivable place?
posted by scarabic on Sep 9, 2004 - 10 answers