An ancient Martian system of canyons and valleys could be home to archaic life forms, a ground-breaking scientific paper has found. Scientists investigating the Red Planet’s mind-boggling cave system ...

Investigators explore claims of a hidden tunnel system linking Sedona and Skinwalker Ranch, sparking theories of military activity and unexplained sightings in these UFO hotspots.

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, ...