With mouths closed, the older, smaller teeth of the ancestors of today’s sharks stood upright on the jaw, while the younger and larger teeth pointed towards the tongue and were thus invisible when the mouth was closed. Credit: Christian Klug, UZH

Prehistoric shark hid its largest teeth

A graphic showing the convective heat cycle (red arrows) that drives plate tectonic motion (black arrows) on Earth. Heat flows toward subduction zones through the uppermost mantle layer, the asthenosphere. A computer model from Rice University finds that the asthenosphere can locally drag plates along with it rather than acting exclusively as a brake on plate movements as had been widely believed. (Image courtesy of Surachit/Wikimedia Commons)

Former piece of Pacific Ocean floor imaged deep beneath China

Final model for the East African Rift System. Hashed lines indicate newly discovered broad deforming zone. Arrows represent predicted tectonic plate motions. ABFZ—Andrew Bain Fracture Zone; IFZ—Indomed Fracture Zone; RSZ—Ranotsara shear zone. Figure created by D.S. Stamps.

East African Rift System is slowly breaking away, with Madagascar splitting...

An artist impression of the newly discovered extinct monk seal species Credit: Jaime Bran. Copyrigh: Museum of New Zealand Te Papa.

Eomonachus belegaerensis : New fossil seal species rewrites history

Map & Skulls. Credit: Journal of Vertebrate Paleontology

Paleontologists uncover three new species of extinct walruses in Orange County

Similar to present-day diurnal birds of prey (right), the talons on the hind toe and the second toe of Primoptynx poliotauros (left) are noticeably larger than the talons on the third and fourth toe. In modern owls (center) all four talons are roughly the same size.

A 55-Million-Year-Old Owl Skeleton

Fungus gnat trapped in a piece of defaunation resin from Madagascar. Credit: Enrique Peñalver

After 1760 It Is Called Resin

Pterosaurs with these types of beaks are better known at the time period from North Africa, so it would be reasonable to assume a likeness to the North African Alanqa. Credit: Attributed to Davide Bonadonna

Fossil shark turns into mystery pterosaur

Titanosaurs were common at the time of the asteroid hit at the end of the Cretaceous 66 million years ago. (Credit: AlienCat)

New analysis refutes claim that dinosaurs were in decline before asteroid...

The extinct Kiritimati Sandpiper, Prosobonia cancellata - a close cousin of the newly discovered Prosobonia sauli. Credit: George Edward Lodge, 1907

Henderson island fossils reveal new Polynesian sandpiper species

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