The Chicxulub asteroid impact that wiped out the dinosaurs likely released far more climate-altering sulfur gas into the atmosphere than originally thought
The extremely bright X-rays from the Advanced Photon Source will give scientists an unprecedented look inside the arm bones of the largest and best-preserved T. rex skeleton ever found
Previously, scientists had thought that creatures living in the southernmost regions of the planet would have been in a less perilous position during the mass extinction event