The 10-foot-long female stopped breathing after locals tried several times to coax her back into the water. The cause of the animal's death remains a mystery.
Stressful medical experiences, such as undergoing major surgery or giving birth, can accelerate age-related changes in cells that then disappear during recovery.
Paleontologists in Wyoming have discovered a new genus and species of rhynchosaur, an herbivorous reptile related to modern crocodiles.
A new look at the 13th-century Stone of Destiny reveals mysterious markings and other 'anomalies' that previously went unnoticed.