An eminent astrophysicist argues that signs of intelligent extraterrestrial life have appeared in our skies. What’s the evidence for his extraordinary claim?

The Milky Way could be teeming with interstellar alien civilizations, according to a new study. We just don’t know about it because they haven’t paid us a visit in 10 million years.

The Drake equation is one of astronomy’s most famous attempts to answer the question: Are we alone? A single equation lets astronomers estimate how many advanced civilizations capable of contacting us might be out there. Here's how it works. The Drake equation is one of astronomy’s most famous attempts to answer the question: Are we alone? It asks not just about any life, but the top shelf stuff: intelligent life with the ability to communicate with beings outside their planet.

Humanity may be as few as 10 years away from discovering evidence of extraterrestrial life. Once we do, it will only deepen the mystery of where alien intelligence might be hiding.

They are watching us and do not want to make contact, according to a theory by an MIT scientist.