Universe

  • What caused the Big Bang?
  • Beware of the zombie planet!
  • The size of the observable universe in perspective
  • The moon illusion
  • When planets collide
  • The universe as understood in 1660
  • Earth-sized planet found orbiting the sun's nearest neighbor
  • Michio Kaku: A nano ship to the stars
  • Photos of the Red Bull Stratos space jump