From unexplained phenomena to baffling disappearances, follow the clues while discovering our country’s treasured protected ...

Picture stumbling across a bone in the dust, only to realize you’re holding a secret from millions of years ago. That’s the ...

Imagine a world where enormous cats once prowled the wilderness with teeth so long, they looked like ivory daggers. Most ...

A few things on this planet are old enough to make history books look recent, and that includes some living trees that have ...

Wikimedia Commons/US Geological Service White Sands, New Mexico David Bustos found strange marks in the white sands of New ...

The forest floor is a world of wonder in its own right – a soft carpet of redwood sorrel, sword ferns, and emerald moss that has evolved to thrive in the perpetual twilight created by the dense canopy ...