Geobiologists shine new light on Earth s first known mass extinction event 550 million years ago miragenews.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from miragenews.com Daily Mail and Mail on Sunday newspapers.
Philosopher William MacAskill contends that humanity’s long-term survival matters more than preventing short-term suffering and death. His arguments are shaky.
Holocene Extinction, Anthropocene Extinction, or Merely the Dust in the Wind? ancient-origins.net - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from ancient-origins.net Daily Mail and Mail on Sunday newspapers.
Scientists uncover mysterious mass extinction event that nearly wiped out sharks 19 million years ago
More than 90% of all sharks suddenly disappeared and no one knows why.
Credit: Pixabay.
Sharks are some of the most resilient and successful predators in history, having been around for more than 400 million years ago. Believe it or not, sharks are actually older than trees, which didn’t appear in their familiar form trunk and crown of leaves or fronds until the Late Devonian, some 360 million years ago. However, that doesn’t mean that sharks haven’t had their fair share of close calls with total annihilation, including a previously unknown mass extinction approximately 19 million years ago, which was only recently uncovered by scientists.
Jeremy Williams, an assistant professor of geology at Kent State University, discussed the Great Dying Event as a part of OU’s Geological Sciences Colloquium Series.