New cave-dwelling plant discovered

A new, and rare, species of nettle has been found in the limestone caves in China.

Astronauts search for life - underground

An international crew of six astronauts is poised to kick off a six-day caving training session on the sunny Italian island of Sardinia.

Ancient stencils may show Neanderthal hands

The well-known cave paintings at El Castillo in Northern Spain possibly weren't produced by modern humans at all, say scientists, but by Neanderthals.

Middle-school students discover cave on Mars

A seventh-grade class in Cottonwood, California, has discovered a Martian cave.