Claims that aliens are already here are everywhere, but proving them is another matter. The strongest cases become more ...

When scientists search for alien life, they usually look for planets that resemble Earth. The reasoning is simple. Every known living thing depends on liquid water, carbon based chemistry, and the ...

Of the estimated 100,000 ships entering U.S. ports from foreign waters each year, only 30 percent reported their ballast water management practices during the first two years that the U.S. Coast Guard ...

The TV series Alien:Earth has introduced a number of new creatures to the much loved, albeit terrifying, Alien franchise. But how realistic are the new aliens? That's a question that we—a trio of ...

With the release of "Disclosure Day," Steven Spielberg's new film about aliens, a question as old as science fiction itself resurfaces: If aliens were to arrive on Earth, would they come to conquer us ...