Search PBS Space Time


2020-10-13: Do the Past and Future Exist?

  • 14:47: ... something may be ahead of us - like nuclear war, environmental destruction, ... Or it may be behind us, like it might be ...

2017-07-19: The Real Star Wars

  • 02:22: ... developed to the point that a single missile could deliver multiple nuclear warheads several thousand kilometers away in a ...
  • 12:23: The Cold War arms race was on track to fill Earth's orbit with satellite-destroying weaponry and nuclear warheads.

2015-11-05: Why Haven't We Found Alien Life?

  • 00:43: ... civilizations before they get to the galactic empire stage, whether by a nuclear war, environmental catastrophe, accidentally making a black hole that ...

2015-03-11: What Will Destroy Planet Earth?

  • 00:00: Lots of unpleasant things from nuclear war to asteroid impacts could destroy life on Earth.
4 result(s) shown.