Scientists solve evolutionary puzzle: how turtle got shell

dailymail.co.uk — Scientists believe they have cracked a long-standing mystery of evolution - how the turtle got its shell.It follows the discovery in south west China last year of the oldest known turtle fossils, believed to date back 220 million years.The three adult specimens were discovered remarkably intact with characteristics never before seen in turtles. Nov 26, 2008 View in Crawl 4