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

Wow in the World · B1 · 2020-10-12

Preschool Enlightenment
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📋 Summary

The Paranormal Panic

In this episode of Wow in the World, the familiar, minimalist home of Guy Raz becomes the site of a supposed supernatural disturbance. Guy Raz, disturbed by eerie, growling noises in the middle of the night, enlists the help of Mindy and her trainee, Reggie, who arrive in their "ghost catching mobile" (an ice cream truck) claiming to be experts in the supernatural. Despite Guy Raz’s skepticism regarding Mindy’s "online degree"—which is nothing more than a napkin with "I am qualified" written on it—the duo proceeds to perform a "paranormal evaluation" of the house.

Scientific Reality: The Ghost Crab

After dismissing the idea of ghosts, Mindy identifies the true culprits as ghost crabs. These crustaceans, native to the American Atlantic coast, are known for their pale, camouflaged appearance and nocturnal habits. The "spooky" sounds Guy Raz heard were not paranormal phenomena, but rather examples of vocalizations—the biological process by which animals communicate. Mindy explains that these crabs possess a unique biological feature known as a gastric mill, a set of teeth located inside their stomachs used to process food, which also facilitates their distinct growling sounds.

The Mechanism of the Growl

Drawing on research from Jennifer Taylor at the Scripps Institute of Oceanography, the hosts delve into how these crabs produce their intimidating noises. The ghost crab utilizes a two-pronged approach to vocalization:

  1. Claw Rubbing: The crabs use bristles on their claws to create a warning sound, meant to deter predators or rivals from a distance.
  2. The Gastric Mill: When a threat gets "up close and personal," the crabs engage their stomach teeth. Scientists confirmed this secondary, internal vibration using a laser Doppler vibrometer, a high-tech tool that measures vibrations. This confirms that the growling is a deliberate biological defense mechanism rather than a ghostly haunting.

Conclusion and Community Engagement

After successfully luring the crabs out with clams and melted butter, Mindy and Guy Raz relocate the creatures to the Atlantic coast, restoring peace to Guy Raz’s home. The episode serves as a playful reminder that what we perceive as "spooky" or "paranormal" often has a fascinating scientific explanation rooted in the animal kingdom.

Beyond the primary narrative, the episode highlights the importance of curiosity and scientific exploration. The "Wow in the World" community continues to participate through listener submissions, covering topics from the history of Apollo mission waste on the moon to the biology of jellyfish and the potential for terraforming Mars. By blending humor with rigorous scientific concepts, the show encourages young "Wowzers" to look at the world around them with a sense of wonder, proving that the most interesting mysteries are often found in nature, not in the supernatural.

🎯Key Sentences

1
I think I'll pass.
2
Wait, what?
3
I'll take all the help I can get at this point.
4
Keep it tidy.
5
Wait, don't you need my address or...
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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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