From lava tubes on Mars to ice pockets on Europa, subterranean environments may offer the best chance of finding life—and ...

Could ancient humans really have built the pyramids without extraterrestrial help? Or do such questions reveal more about modern anxieties than the past itself? The idea that aliens assisted the ...

Katie has a PhD in maths, specializing in the intersection of dynamical systems and number theory. She reports on topics from maths and history to society and animals. Katie has a PhD in maths, ...

Erich von Däniken proposed that monumental structures such as the pyramids could have been built with help from aliens. Stefan Baumann Could ancient humans really have built the pyramids without ...