Deep within Mammoth Cave, the world’s longest cave system, paleontologists have uncovered the remains of a never-before-seen species of ancient shark. Named Clavusodens mcginnisi, or McGinnis’ nail ...

POLARIS has long helped mariners find their way through our planet's seas and oceans by pointing the way north.

Sturgeons are one of the oldest groups of fishes. Sporting an armor of five rows of bony, modified scales called dermal scutes and a shark-like tail fin ... sturgeon have been called living fossils.

Chinese and South Korean researchers jointly discovered the oldest known phosphatic stromatoporoid sponge fossil dating back 480 million years called Lophiostroma leizunia in Yichang, Central ...