[The Secrets of the Thresher Shark's Whip-like Tail]-[Shark Tail (4/29/24)]

Wow in the World · B1 · 2024-04-29

📋 Summary

The Biological Marvel of the Thresher Shark

In a recent, highly energetic episode of Wow in the World, hosts Mindy Thomas and Guy Raz explore the fascinating biomechanics of the thresher shark. Through a humorous classroom setting titled "Stretching with Sandy," the team draws parallels between human physical flexibility and the specialized anatomy of one of the ocean's most unique predators.

The "Thrasher" Technique

Grandma G-Force introduces the "Thrasher" stretch, a multi-step movement involving locking eyes on prey, a full body flex, and a whip-like motion of the tail. This performance serves as a gateway to understanding the thresher shark, a species of mackerel shark found in temperate and tropical waters. Unlike other sharks that rely primarily on powerful jaws, the thresher shark utilizes its "extra long, extra flexible whip-like tail" to stun schools of fish. By "herding" its prey into a small area, the shark delivers a high-speed strike, allowing it to "gobble up its fishy prey in a single gulp."

Scientific Investigation: The Structure of Vertebrae

To understand how this animal achieves such extreme range of motion, the hosts reference a study published in the Royal Society of Open Science led by Dr. Mary Ann Porter. The researchers examined 10 different specimens, ranging from "embryos" to "full-grown threshers," using X-ray photos and 3D digital models to analyze their vertebrae—the bones that form the spine.

Key findings from the study include:

Bony Plate Structure: The sharks possess bony plates that radiate like "spokes on a bike wheel," which vary in length along the body.
Stability vs. Flexibility: The vertebrae in the main body (the belly and back) act as a "strong, steady, and stable" foundation. However, as the structure extends toward the tail, it transitions into a highly flexible system.
The Catapult Effect: The study reveals that the tail's unique vertebral structure allows it to act as a "catapult," providing the necessary power to whip the tail over the shark's head with incredible force.

Conclusion and Future Implications

The episode highlights that the thresher shark’s ability to "swing its body from side to side" and perform its signature "whip-crackin'" tail strike is entirely dependent on the specific connectivity and structure of its backbone. This discovery not only sheds light on shark biology but also suggests potential for future engineering and inventions modeled after the shark's efficient, flexible anatomy. The episode concludes with a reminder of the importance of protecting these rare marine creatures, as their unique evolutionary adaptations are a testament to the wonders of the natural world.

🎯Key Sentences

It's going to be a November to remember.

But for now, let's get on with the show.

Sorry, I'm just so excited.

I just can't believe how flexible she is.

Everyone take a deep breath in.

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📝Key Phrases

music to one's ears

let's get on with

take a deep breath

loosen up

on one's own

Expand All

📖 Transcript

Grownups, Wondery Plus subscribers can listen to Wow in the World early and ad-free right now.

Join Wondery Plus in the Wondery app or Wondery Kids Plus on Apple Podcasts.

Hey, Wowzer fans, Mindy here.

And before we start the show, I gotta let you know that this November, with a special new episode featuring our friends at Circle Round and Terrestrials on Radiolab for Kids,

And don't miss when Elmo from Sesame Street stops by Wow in the World to make us all belly laugh on November 24th.

Oh, but that's not all, Reg.

Or study on the web version →