A new study has found that shark populations experienced more than a 70 per cent decline nearly 19 million years ago, a rate of extinction nearly two times that of the extinction that occurred during the time of the dinosaurs.
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" "So far, the cause of this die-off remains unknown. There were no significant climatic changes in the early Miocene, and there’s no evidence of an asteroid impact around that time.
“We have no idea,” Sibert said.
“It’s a fascinating mystery,” Rubin added.
Sharks never fully recovered from this incident...