Most Read

[DIGEST: GMA Network, BBC, National Geographic]

The Cave of the Crystals is only beginning to reveal its secrets. The spectacular cave, discovered in 2000, is connected to the Naica Mine in Chihuahua, Mexico. It quickly became famous for its gigantic crystals — the largest is 39 feet long. Now NASA scientists have discovered something else inside the cave: some of those crystals contain dormant life forms that are over 50,000 years old.

Keep reading... Show less