Researchers have found evidence of horseback riding in skeletal remains of people who lived about 5,000 years ago, adding to a body of research on when people first started using horses to get around.
Genomic sequencing reveals new evidence of interbreeding among different groups of our ancient relatives. A scientist calls the find "almost too lucky to be true."
Scientists have found stone tools in India dating back to 385,000 years ago. The sharp tools were made with a Stone Age technique thought to have originated in Africa and Europe.