Few of the things I care about in this endless pursuit of knowledge, as an individual on this earth … Concisely and very precisely thought out and written in simplicity:

  1. Universe
  2. Life
  3. Death
  4. Free Will
  5. Sex

Michael Brooks on five mysteries of the universe.

Update: In a tangential topic, here are couple of things few others are worried, about the solar system: The Unknown Solar System.