Chinese astronauts, known as taikonauts, were sent into a large limestone cave system in a remote area of China.

Peeling back the layers of our Earth’s crust, scientists have unveiled an astonishing underground realm in the United States. This monumental subterranean labyrinth promises not only breathtaking ...

Vjetrenica is one of the longest caves in Bosnia and Herzegovina. Topographic mapping is still in progress, meaning that its length exceeds the published 5699 m (Lučić & Sket, 2003). According to ...