The universe is vast and teeming with stars – but if intelligent life exists, it may not be able to visit Earth.

Actual science finds itself badly outnumbered by entertainment repackaged as factual. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. This ...

Physicist Richard Feynman argued that fundamental limits of physics, biology, and time make interstellar contact between civilizations effectively impossible. He cited vast distances, the speed of ...