Joining two previously known underwater caves, the newly discovered system is 215 miles long. 0:51. Explore the World's Largest Underwater Cave January 17, 2018 ...

Weird Life Found Trapped in Giant Underground Crystals. Floating in pockets of fluid, the microbes are likely new to science and may be up to 50,000 years old, a NASA researcher says.

World Heritage partnerships for conservation. Ensuring that World Heritage sites sustain their outstanding universal value is an increasingly challenging mission in today’s complex world, where sites ...