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Biologists in Arkansas started reporting scores of paralyzed, convulsing, or dead bald eagles more than 25 years ago. Their brains were riddled with lesions never before seen in eagles. The disease was quickly discovered in other birds in the southeastern United States. The birds had died from a disease called...
The researchers examined over 200 skulls and jaws, including bones from crocodiles and their extinct ancestors dating back 230 million years. They investigated shape variation to reveal species variations and examined how quickly crocodile classes evolved over time. Crocodiles, alligators, and gharials, the only surviving crocodilians, are more cautious than...
Ninjatitan zapatai lived approximately 140 million years ago (Early Cretaceous epoch) in what is now Patagonia, Argentina. “During evolutionary history, sauropods had different moments, different pulses of gigantism, which were not only related to the group of titanosaurs,” said Dr. Pablo Ariel Gallina, a paleontologist at the Fundación Azara in Maimonides University and...