Sharks Don't Leave Fossilized Shark Scales

Today, you’ll learn about a new project trying to keep humans and sharks separate and safe, how all sharks almost mysteriously went extinct 19 million years ago, and how great white sharks may have contributed to the extinction of a shark twice its size!

Boundaries between sharks and humans.

• "DR. CRAIG O’CONNELL INTERVIEW" by James Lynch
  • https://docs.google.com/document/d/11cCRcmKohhTGOf67QtF_tQ59cMr2w6pq0DaA5pLrOcI/edit?usp=sharing
• About O’Seas Foundation by O’Seas Foundation
  • https://www.oseasfdn.org/about

Near extinction.

• “Something mysteriously wiped out about 90 percent of sharks 19 million years ago” by Carolyn Gramling
  • https://www.sciencenews.org/article/shark-die-off-mystery-fossils-pacific-ocean-paleontology
• “Rate of atmospheric carbon dioxide rise unprecedented” by Thomas Sumner
  • https://www.sciencenews.org/article/rate-atmospheric-carbon-dioxide-rise-unprecedented
• “An early Miocene extinction in pelagic sharks” by ELIZABETH C. SIBERT AND LEAH D. RUBIN
  • https://www.science.org/doi/full/10.1126/science.aaz3

Great white > megalodon

• “Great White Sharks May Have Driven Megalodons into Extinction” by Elizabeth Gamillo
  • https://www.smithsonianmag.com/smart-news/great-white-sharks-may-have-driven-megalodons-into-extinction-180980179/
• “Trophic position of Otodus megalodon and great white sharks through time revealed by zinc isotopes” by Jeremy McCormack, Michael L. Griffiths, Sora L. Kim, Kenshu Shimada, Molly Karnes, Harry Maisch, Sarah Pederzani, Nicolas Bourgon, Klervia Jaouen, Martin A. Becker, Niels Jöns, Guy Sisma-Ventura, Nicolas Straube, Jürgen Pollerspöck, Jean-Jacques Hublin, Robert A. Eagle & Thomas Tütken
  • https://www.nature.com/articles/s41467-022-30528-9
• “Great White Sharks May Have Pushed Megalodons to Extinction” by Isaac Schultz
  • https://gizmodo.com/great-white-sharks-megalodon-extinction-1848995245

For more about sharks, head to SharkWeek.com and don't miss #SharkWeek starting 7/24 on Discovery and streaming on discovery+.

Find episode transcripts here: https://curiosity-daily-4e53644e.simplecast.com/episodes/extinct-super-sharks-mysterious-die-offs-stopping-attacks

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