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[The Mystery of the Noisy House: Uncovering the Secrets of Ghost Crabs]-[Growling Ghost-Crabs]

Wow in the World · B1 · 2019-12-02

Preschool Enlightenment
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📋 Summary

The Mystery of the Noisy House: Uncovering the Secrets of Ghost Crabs

In this episode of Wow in the World, hosts Mindy and Guy Raz embark on a comedic yet educational investigation into a "paranormal" disturbance in Guy Raz’s home. What initially presents as a spooky haunting turns into a fascinating deep dive into the natural world, specifically the biological marvels of the ghost crab.

The "Haunted" Bungalow

Guy Raz finds himself unable to sleep due to mysterious, unsettling sounds emanating from his walls. In a humorous turn of events, Mindy shows up, self-appointed as a "ghost catcher" with a makeshift degree, accompanied by her trainee, Reggie. After dismissing the idea of supernatural entities, Mindy identifies the true culprit: ghost crabs. These crustaceans are named for their pale, translucent appearance and their tendency to be active at night, characteristics that often lead them to be overlooked or misunderstood.

Understanding Ghost Crab Vocalization

The central scientific inquiry of the show revolves around how ghost crabs produce their signature "growling" noise. Mindy and Guy Raz explore the concept of vocalization, which refers to sounds made by animals to communicate. While humans use speech and birds use song, ghost crabs utilize a two-pronged approach to create their intimidating sounds:

  1. Claw Stridulation: The crabs possess tiny bristles on their claws. By rubbing these claws together, they produce a sound designed to warn off predators or competitors from a distance.
  2. The Gastric Mill: The most intriguing discovery is the crab's "grumbly tummy." Scientific research, including studies from Jennifer Taylor at the Scripps Institute of Oceanography, reveals that ghost crabs have a gastric mill—a set of teeth located inside their stomachs used to process food. By grinding these internal teeth, the crabs produce a secondary, lower-frequency growl.

Scientific Methodology in Action

The hosts discuss the use of a laser Doppler vibrometer, a high-tech scientific instrument that measures vibrations. Researchers used this tool to confirm that the secondary noise observed in ghost crabs was indeed originating from the vibration of their internal gastric mills. This mechanism serves as a defensive display, particularly useful when a crab is in a "hostile situation" or feels threatened up close.

Conclusion: Back to the Atlantic

After successfully luring the crabs out with their favorite food (clams, served with a dash of melted butter for comedic effect) and capturing them with a "high-tech" butterfly net, Mindy and Guy Raz return the creatures to their natural habitat along the Atlantic coast. The episode serves as a reminder that what we often perceive as "spooky" or "paranormal" in our environment is frequently just the hidden, complex, and fascinating behavior of the natural world.

Ultimately, this episode bridges the gap between silly, imaginative storytelling and real-world biology, encouraging listeners to look closer at the "wows" hidden in their own backyards. As Guy Raz notes, understanding these animal behaviors turns a night of fear into a night of learning, allowing him to finally "sleep soundly."

🎯Key Sentences

1
I think I'll pass.
2
I can't help it.
3
Look, it's got sequins and everything.
4
I'll take all the help I can get at this point.
5
Keep it tidy.
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📝Key Phrases

1
music to your ears
2
get on with the show
3
things that go bump in the night
4
have no fear
5
take all the help I can get
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📖 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.

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