New technologies have brought new significance to a set of fossilized jaws that Stephen Gatesy and colleagues found in Greenland 20 years ago. Their new analysis shows that proto-mammals were diversifying earlier than previously thought. (more…)
What could a guineafowl strolling through a bed of poppy seeds have to do with a dinosaur footprint made 200 million years ago?
PROVIDENCE, R.I. [Brown University] — Stephen Gatesy, professor of ecology and evolutionary biology at Brown, and his former postdoctoral fellow Peter Falkingham, now at the Royal Veterinary College in the United Kingdom, used measurements from X-ray videos of the 3-D foot movement of a chicken-like bird as an input for a computer simulation of a substrate of poppy seeds. In this way, they could visualize the displacement of seeds through time and study the “birth” of tracks at different depths. The researchers then used the model to clarify previously unexplained features of a Jurassic dinosaur track. (more…)
