How the turtle gets its shell / Scott F. Gilbert, Judith A. Cebra-Thomas, and Ann C. Burke -- Comparative ontogenetic and phylogenetic aspects of Chelonian chondro-osseous growth and skeletochronology ...

This one-ton turtle once ruled South America’s rivers — until a changing planet proved too much for even the largest ...

For centuries, determining longitude was an extremely difficult task for sailors, so difficult that it's been thought improbable -- if not impossible -- for animals to do it. But migratory sea turtles ...