Big questions

This page is a list of some of the big unsolved questions in biology. Add or comment as you please.


 * How did life start?
 * Why and how did the current chemistry emerge?
 * What is the nature of consciousness?
 * Why do we sleep?
 * Why do we have sex?
 * More generally, why 2 sexes and not 1, 3, 4, etc.
 * Why do we age?
 * How can we predict protein folding?
 * How about the reverse folding problem (designing a protein with a given fold)?
 * What do the bases in the human genome mean?