In late 1996, scientists announced the discovery of a three-foot-long, 120-million-year-old fossil dinosaur in Liaoning province, northeastern China, with traces of a feathery down running from its head and down along its back and tail that suggest it could be a possible ancestor of birds. ...
The discovery was a serendipitous one. Because thisT. rexfossil was located in a remote part of Montana (the Hell Creek formation, where about two dozen species of dinosaurs have been found) the fossil had to be removed by helicopter. According to paleontologist Jack Horner, who participated i...
A high latitude vertebrate fossil assemblage from the Late Cretaceous of west-central Alberta, Canada: Evidence for dinosaur nesting and vertebrate latitudinal gradient Palaeogeography, Palaeoclimatology, Palaeoecology 275, 37-53) reports on a new assemblage of terrestrial vertebrate fossils from the ...
To answer this, the team turned again to the fossil record, this time looking at 27,903 fossil occurrences in all latitudes of North America representing 63 million years of mammalian life—from the time of the dinosaur extinctions to 2 million years ago. They compared mammalian species diversit...
within two years some 60 percent become infected. The discovery of Escovopsis’s role brings a new level of understanding to the evolution of the attine ants. “In the last decade, evolutionary biologists have been increasingly aware of the role of parasites as driving forces in evolution,”Dr...