An ancient Martian system of canyons and valleys could be home to archaic life forms, a ground-breaking scientific paper has ...

Veryovkina Cave reveals more mysteries the deeper you go. Here’s everything that makes this cave a world of its own. Some of Earth’s most extreme frontiers lie beneath our feet, in places so ...

Fresh orbital images and new geological analysis have revealed eight mysterious caves on Mars that appear unusually well suited to protect traces of life. Together, these caverns, portals and ...

Monisha Ravisetti was a science writer at CNET. She covered climate change, space rockets, mathematical puzzles, dinosaur bones, black holes, supernovas, and sometimes, the drama of philosophical ...