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

Scientists have pieced together a pretty clear picture of what life was like on Earth thousands, even millions of years ago.

Are humans alone in the universe, or could intelligent alien civilizations exist somewhere beyond Earth? For more than 60 ...

A massive spaceship appears in the night sky. Communications are cut off, and cities around the world are attacked. Humanity ...

Alien life may not need the kind of home humans instinctively search for. Some of the strangest possibilities begin once ...

What if aliens were building a massive power plant?Last time, I talked about the "Kardashev scale," which classifies the ...