Astrobiologists propose that alien civilizations need accessible coal deposits to industrialize exoplanets and become detectable from Earth.

The curious minds at What If imagine aliens arriving on Earth today without warning, exploring the immediate reactions, chaos, and first contact scenarios.

Are we alone in the Universe? With more than 100 billion galaxies in the observable Universe and at least 500 billion planets in the Milky Way alone, don't you think we should have found something by ...

Lightsabers curling plasma, jetpacks for casual flights: My 15 top absurd picks from Star Wars to The Rocketeer show how ...