300,000-year-old cave markings in Germany suggest Stone Age humans were wearing clothes. Humans skinned huge cave bears to keep warm, per markings on bones analyzed by experts.

Markings on the bones of today's ruminant animals has thrown doubt on the theory that dinosaurs were cold-blooded reptiles like snakes and lizards, say Barcelona researchers.

Researchers from London's Natural History Museum recently reexamined the bones' markings, revealing evidence of percussion, butchering, human teeth marks and ritualistic carving.

Paleontologists have discovered that around 15,000 years ago, British cave dwellers filleted and ate their dead relatives before inscribing markings on their bones in grisly prehistoric rituals.