Two 325-million-year-old ctenacanth shark fossils discovered in Mammoth Cave shed light on ancient marine ecosystems.

Like modern animals today, it’s believed Albertosaurus could have hunted in packs Across the series, the extraordinary ...

Long before the Great Lakes came to define the heart of North America, a much larger lake once ruled the land. Lake Agassiz, a prehistoric inland sea, spread across the continent with a reach that ...

The animals that plummeted 85 feet into Wyoming’s Natural Trap Cave provide a layered history of life dating back to the ...

President Donald Trump hailed an 'awesome display of pure, unrivaled American military might' after troops at Fort Bragg put ...