Janet Eger and Teena Ligman have hiked hundreds of miles across southern Indiana. The two recently shared some family-friendly jaunts to "undiscovered treasures" in Lawrence and Orange counties. Eger ...

Tiny fleets of robots could map unexplored Martian lava tubes by periodically dropping breadcrumb-like sensors onto cave floors, researchers say. Reading time 3 minutes Researchers from the University ...

SIOUX FALLS, S.D. (AP) — The National Park Service is beginning to excavate the mouth of an unexplored cave in the Black Hills of South Dakota, and researchers believe it could help broaden our ...

The concept of unexplored places feels almost impossible in our hyper-connected world of satellite imagery and GPS tracking. Yet beneath the Earth’s surface, deep within dense jungles, and under vast ...

VOLCANO, Hawaii - About the time jagged edges started poking through my T-shirt as I wormed my way through a tight spot in a lava tube, I began to wonder: What am I doing here? We could have been ...

IN A flooded cave system in the Mexican state of Quintana Roo, on the Yucatán peninsula, a manatee mother (pictured above) swims up to cave diver Klaus Thymann, who captured stunning images of these ...

(via MinuteEarth) Krubera Cave, one of our planet’s deepest known caves, extends 2200 meters into the earth – that’s a depth of nearly six Empire State Buildings. Or at least, that's as far down as ...