For decades, science fiction writers have tried their best to prepare us for eventual contact with aliens. Their efforts are dominated by several recurrent tropes. There's the invasion by a warlike ...

Attention human. You are receiving an interstellar radio transmission. And it could be coming from one of the nearest ...

The Kardashev Scale is one of the most widely discussed scientific frameworks for measuring the technological advancement of civilizations, from planetary energy use to controlling entire galaxies.