Caves

Hawaii just doubled the number of known land mammal species that are native to the islands, thanks to the discovery of a number of fossils representing a tiny bat.

Some undiscovered ones may extend far deeper into the Earth than the record of 1.36 miles.

Deep beneath the surface of the Earth, in a dank and dismal cave, lives Hades, the invertebrate king of hell.

Shattered cave formations in the central and eastern United States preserve one of the longest records of powerful earthquakes in these regions.

While spelunking in northern Israel, cavers stumbled upon a hidden stash of ancient coins and jewelry from the era of Alexander the Great, the Israel Antiquities Authority announced.

Bacteria aren't just tenants inside Sweden's Tjuv-Ante's Cave. The microbes are building calcite dripstones on the ceiling.

In Sweden's Tjuv-Antes cave, bacteria help build fanciful rock formations called dripstones.

A 3D modeling technique allows researchers to stay dry while studying skeletons found in a deep underwater cave on the Yucatan Peninsula.