They hike for hours through a massive cave system, the kind of slow grind where every mile steals a little more energy and a ...

The deepest man-made hole on Earth is no longer a gaping wound in the Arctic rock but a quiet, sealed scar. Once hyped as a ...

China begins drilling a six-mile-deep scientific well named Shendi Take 1 to explore the depths of the Earth and its secrets.

The discovery of a hidden supermassive black hole inside an ancient galaxy suggests that some of our universe's most extreme objects could be invisible unless observed in infrared wavelengths, James ...