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An ancient snake's cheekbone sheds light on evolution of modern snake skulls 100-million-year old legged snake fossil provides critical insight into how the heads of modern snakes evolved
The researchers examined a strikingly well-preserved fossil of the rear-limbed snake Najash rionegrina, found in Argentina. The study shows that nearly 100 million years ago, these legged snakes still had a cheekbone -- also known as a jugal bone -- that has all but disappeared in their modern descendants.(University of Alberta)


Release Time:2019-11-22 14:43 Views:144