Last night, the US PBS television stations aired a new show from the series NOVA, “Asteroid — Doomsday or Payday.” It portrayed the two sides of asteroids: if a large asteroid collides with Earth, it could set off deadly blast waves, raging fires and colossal tidal waves. But on the other hand, some asteroids are … Continue reading Watch PBS NOVA’s “Asteroid—Doomsday or Payday?”