Son Doong cave big enough to hold a skyscraper.
A cave is "a natural opening in the ground extending beyond the zone of light and large enough to permit the entry of man," according to the U.S. Geological Survey. Caves can range in size from single rooms to large formations with winding passageways that extend for miles. Caves typically form in types of rock, such as limestone, that dissolve in water. It can take tens of thousands to hundreds of thousands of years for caves to form. The study of caves is called speleology, and the exploration of caves is called spelunking. Caves are famous of their dripstone features called speleothems, the most well-known of which are stalactites and stalagmites. Many of the strange creatures found in caves have adapted to live in near or total darkness — some are blind to visible light. See cave pictures and read about the latest cave discoveries and speleological research below.
Scientists explore caves to study the Earth’s history, as they dream of traveling back in time. In this case, to the Precambrian.
Ancient hunters painted the sections of their cave dwellings where singing, humming and music sounded best, a new study suggests.
Like our ancestors might have done, chimps seek refuge from the heat in a cave in a dry savannah, adding to the range of cultural behaviors among primates.
Two albino millipedes have come out of their cavernous hiding places and represent an entirely new genus of these leggy organisms.
Bacteria known to decorate caves are now found to help build and expand their dark homes by eating the walls.