Mercuriceratops: flashy Cadillac of the late Cretaceous

One oddly-shaped dinosaur bone might not turn out to be a new species. It could simply be from a deformed individual of something already known, or a distortion caused by being buried under tons of shifting rock for millions of years. But two of the same oddly-shaped dinosaur bones? That's no coincidence . . .… » 6/19/14 2:00am 6/19/14 2:00am

The First Genital In An Animal Evolved From An Extra Pair Of Legs

A recent analysis of placoderm fossils — an early jawed vertebrate — shows that the animal kingdom's first genital organ was a "clasper" that evolved from an extra set of legs, and that the first sexual mating position was likely to have been a missionary one. » 6/10/14 9:40am 6/10/14 9:40am

From Footprints to the Feet that Made Them

Footprints, swimming scrapes, casts, eggshells, toothmarks, and even dung are the traces left by creatures going about their lives. For every fossilized bone, an ancient creature left behind uncounted traces of the life it lived. Tony Martin explores the world revealed by ichnology in his book, Dinosaurs Without Bones. » 5/27/14 1:19pm 5/27/14 1:19pm

Ready For Some Croc-on-Croc Violence? Cretaceous Crocs Ate Each Other

We've previously brought you impressive images of crocodylians - that's the group of reptiles that includes alligators, crocodiles, and caimans - being eaten by river otters and by snakes. Now we bring you some intense croc-on-croc violence. We share because we love. » 5/09/14 4:58pm 5/09/14 4:58pm