A set of footprints impressed in clay in the Honseca Cave ... fossils and promote their preservation," says Rodríguez, lead author of the work. More information: J. Rodríguez et al, Cave bear ...

The 20,000-year-old fossilized bones of "Ushikawa Man," thought to be some of Japan's most ancient human fossils ... human and bear bones have been confused: A bone found in a cave in Alaska ...