Trump has ordered a UFO data release. But if aliens exist, what would they think of us? - For generations, human beings have ...

For years, the Fermi Paradox has been framed as a mystery about alien civilizations and why none seem to be out there. But this episode flips that question around and asks something stranger: what if ...

Assuming intelligent aliens know how to harvest energy from stars, would humanity be able to spot these high-level structures? Reading time 3 minutes Assuming aliens do physics like us but are ...

The following is an extract from our Lost in Space-Time newsletter. Each month, we dive into fascinating ideas from around the universe. You can sign up for Lost in Space-Time here. Modern physics ...

In these science fiction books, extraterrestrial beings are sympathetic, horrifying and everything in between.