Mars often feels finished. Mapped, scanned, labelled in broad strokes. Yet every so often, something unsettles that sense of familiarity. A shadow where none was expected. A shape that does not fit ...

CHEYENNE, Wyo. (AP) — Paleontologists digging at the bottom of a strange cave in northern Wyoming say they have uncovered a trove of animal bones from the last ice age this summer and have enough ...

MEXICO CITY (AP) — A prehistoric skeleton has been found in an intricate underwater cave system along Mexico’s Caribbean coast, an area that flooded at the end of the last ice age 8,000 years ago, ...

A mysterious rock painting in South Africa’s cave could be the first-ever artwork of an animal that disappeared 250 million years ago. The San people’s “Horned Serpent Panel” features a strange ...