More than 1,200 years ago, intense bursts of charged particles slammed into Earth. Yet, the only remaining evidence of the extreme cosmic event — which scientists say should have been visible in ...

multicelled life-forms almost four billion years later. What Was Happening on Earth at This Time The Precambrian is the earliest of the geologic ages, which are marked by different layers of ...

We are also asked to believe that, even though the Psychlos conquered Earth 1,000 years previously for its mineral deposits, Fort Knox has been left unlocked and unrobbed. Travolta plays the ...