
Teenage T. rex Fossils
A new analysis of a small pair of T. rex-like fossils, called Nanotyrannus, shows they were actually teenage T. rexes.

Mouse Brains Rewire Themselves
How do you know when something has been engineered? One way to tell is to study the words used to describe its characteristic features. The Mt. Rushmore rock faces have different characteristics from the surrounding uncarved rock that don’t resemble portraits of American Presidents.










