Fossils

Paleontologists at Mammoth Cave National Park have unearthed an ancient shark species previously unknown to science.

It's hard evidence that the type of spinal segmentation and numbering found in modern humans emerged 3.3 million years ago, the scientists say. The remarkable fossil was discovered in Ethiopia.

Did you know that this region was once part of an ancient body of water called the Western Interior Seaway? A large inland sea pushed countless numbers of…