A Solution to Darwin's Abominable Mystery?
There is one remaining issue to address, which is palynology, the science of fossil pollen.
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There is one remaining issue to address, which is palynology, the science of fossil pollen.
Learn about Archosauromorph Reptiles while looking at this week’s Big Ten power rankings!
Theropod, any member of the dinosaur subgroup Theropoda, which includes all the flesh-eating dinosaurs. Theropods were the most diverse group of saurischian (“lizard-hipped”) dinosaurs, ranging from the crow-sized Microraptor to the huge Tyrannosaurus rex, which weighed six tons or more. Unlike the sauropod saurischians, all the theropods were obligate bipeds; that is, their hind legs provided support and locomotion while the short forelimbs and mobile hands were probably adapted for grasping and tearing prey. Despite the group’s name, which means “beast (i.e., mammal) foot,” therop...
A new study by Harvard researchers challenges this theory that the explosion in diversity of reptiles was triggered by two of mass extinction events, around 261 and 252 million years ago.
Contrary to the gradualistic expectations of Darwin’s theory, the distinct body plan of turtles appeared abruptly in the Late Triassic.