Scientists have discovered a small strip of land found frozen in time in petrified mud where a pterosaur once landed in search for food 140 million years ago.

Charles Darwin's upcoming 200th birthday is prompting some U.S. scientists to consider the Victorian-era naturalist's contribution to modern science.

Medullary tissue lines the bones of modern birds for only a few weeks when they are producing eggs. That same tissue has recently been found in three dinosaur fossils. These dinosaurs, an Allosaurus, Tenontosaurus and Tyrannosaurus, were aged 8, 10, and 18. This revelation shines some light on the sexuality of dinosaurs, with reproductive maturity being earlier than researchers previously believed.

By Associated Press WASHINGTON -- Adolescent pregnancy isn't a modern invention, it occurred in dinosaurs millions of years ago.

The peculiar pose of many fossilized dinosaurs, with wide-open mouth, head thrown back and recurved tail, likely resulted from the agonized death throes typical of brain damage and asphyxiation, according to two paleontologists.