Friday Headlines, March 1, 2013
THE LATEST IN THE GEOSCIENCES
It is most commonly depicted that where dinosaurs and other vertebrates co-existed, dinosaurs dominated everything.
Based upon bite marks on the tiny bones of a young dinosaur (plus one example where a croc tooth was still embedded in a dinosaur femur), researchers now understand that crocodyliform reptiles once fed upon dinosaurs. This means that, at least for these dinosaurs, crocodyliforms ruled the roost.
Read the technical article here.
Yes folks, this is a real organism. Paleontologists have, until now, categorized this curious beast as a shark. Paleontologists have have yet to sort out the use of the strange whorl of teeth.
New CT scans of a particularly beautiful specimen from Idaho show that the tooth whorl was actually encased in the lower jaw. The scans also show that Helicoprion is not a true shark, but a member of the closely related fishes, the chimeras (that include the ratfish).