Extinct Super Sharks, Mysterious Die Offs, Stopping Attacks

Curiosity Weekly

Warner Bros. Discovery

Self-improvement, Science, Astronomy, Education

4.6 • 935 Ratings

🗓️ 29 July 2022

⏱️ 14 minutes

🔗️ Recording | iTunes | RSS

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Summary

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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Transcript

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0:00.0	Hi, you're about to get smarter in just a few minutes with Curiosity Daily from Discovery.
0:09.0	Time flies when you're learning super cool stuff. I'm Nate.
0:12.0	And I'm Callie. If you're dropping in for the
0:13.8	first time welcome to curiosity where we aim to blow your mind by helping you to
0:17.4	grow your mind. If you're a loyal listener, welcome back. Today you'll learn
0:21.0	about a new project trying to keep humans and sharks separate and safe,
0:24.6	how all sharks almost mysteriously went extinct 19 million years ago,
0:29.4	and how great white sharks may have contributed to the extinction of a shark twice its size.
0:35.2	Without further ado, let's satisfy some curiosity.
0:38.6	Nate, have you ever heard of Amaglodon?
0:40.6	Uh, weren't those the gigantic 50foot long ancient sharks that went extinct millions of years ago?
0:46.7	That is right.
0:47.7	They were so big they had mouths the size of small cars and teeth the size of fists.
0:52.3	And we might have finally figured out why the massive creatures went extinct.
0:55.4	It's been a controversial topic in science for a long time but in June 2022
1:00.2	studies seem to have found the answer and it's the great white shark.
1:04.1	But great whites are only half the size of megalons.
1:07.2	How could such a smaller shark like the great white lead to the megalodons extinction?
1:11.6	Okay well let me give you some background first.
1:14.2	The sharks co-existed during an era known as the Pliocene Epic around 2 to 5 million years ago.
1:19.6	The sharks hunted the same prey, but researchers think that the Great White was the faster hunter.
1:24.7	This speed may have allowed the Great White to out-compete the larger 60-foot-long megalodon.
	...

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