Mars Rapid Formation Explains Its Small Size Relative to Earth
Mars developed in as little as two to four million years after the birth of the solar system, far more quickly than Earth, according to a new study published in the .
Are there aliens watching us?
AS ASTRONOMERS scan the universe for signs of intelligent life, a group of researchers predicts other beings just might be looking at us.
A scientific paper published in this week's online edition of Astrophysical Journal suggests alien astronomers armed .