No, this is not a children’s story (although it’s a tempting subject). I ran across a post on the EarthSky website that discusses this. Actually, it’s a link to a nine-minute YouTube video from PBS Digital Studios that explains turtle evolution in great detail. It’s probably more than you ever wanted to know, but if you love animals and were ever curious about where these shelled creatures came from, you can view it at http://earthsky.org/earth/how-did-turtles-get-shells-video? .