"Pursuing caves in an active volcano is a different kind of crazy." In 2014, Eduardo "Eddy" Cartaya and a team of adventurers set out to explore a new cave system in one of the most dangerous landscapes in America: the crater of Mount Saint Helens. The expedition uncovered a never-before seen world of ice and steam and volcanic beauty. Revisiting one of the most breathtaking and hair-raising adventures captured by Oregon Field Guide. | OPB

Caves found on Mars Surface? This formation on the surface of Mars looks like a cave or deep opening, raising many questions. Scientists believe such features could be lava tubes, formed long ago when molten lava flowed beneath the surface. These caves are important because they may protect against radiation and extreme temperatures. Some scientists even think Martian caves could be the best places to search for signs of past life. Mars continues to reveal mysterious features hidden beneath its