Figure 1. Fossilized nits of chewing lice, tightly affixed to feathers of an enantiornithine bird, entombed in mid-Cretaceous amber from northern Myanmar. (a) Isolated barbs and regularly arranged ...

Reconstruction of an avisaurid (e.g., A. darwini). Morphology of the tarsometatarsus suggests that these large birds engaged in raptorial behavior and could carry proportionally large prey.

Cretaceous-tertiary cloud chamber / Niles Eldredge -- Palynological change across the Cretaceous-Tertiary boundary on Seymour Island, Antarctica : environmental and depositional factors / Rosemary A.

Germany's waters once saw a recently discovered new reptile species known as the Enalioetes schroederi, best characterized as a crocodile which has dolphin-like qualities which lived around 135 ...

Sixty-six million years ago, at the end of the Cretaceous Period, an asteroid impact near the Yucatán Peninsula of Mexico triggered the extinction of all known non-bird dinosaurs. But for the early ...

The diverse swimming techniques of the ancient reptiles that ruled the Mesozoic seas have been revealed. Some of the most extraordinary body transformations in evolution have occurred in animals that ...

One of the first toothed birds ever discovered, Hesperornis paddled with its hind feet to hunt fish and evade marine reptiles in warm, Cretaceous seas. UnexpectedDinoLesson via Wikimedia under CC ...

A newly identified midsized dinosaur from Mongolia dubbed the "Dragon Prince" has been identified as a pivotal forerunner of Tyrannosaurus rex in an illuminating discovery that has helped clarify the ...