....as compiled by livescience
10. what drives evolution?
9: what happens inside an earthquake?
8: who are you?
7: how did life arise on earth?
6: how does the brain work?
5: where is the rest of the universe?
4: what causes gravity?
3: is there a theory of everything?
2: does alien life exist?
1: how did the universe begin?
humans want to know. for me, no made-up answer will do.
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