A 260 million-year-old fossil has been determined to be the oldest ancestor of turtles found to date, revealing something about the reptile's mysterious past. Michelle Starr is CNET's science editor, ...

Add Yahoo as a preferred source to see more of our stories on Google. When you buy through links on our articles, Future and its syndication partners may earn a commission. The broad-shelled river ...

Sea turtle shells record life history layer by layer over many years, clearly revealing diet, stress, movement, and ocean ...