Wow in the World: "WeWow on the Weekend"
April 5, 2026 | Tinkercast

Episode Overview

In this lively episode of “WeWow on the Weekend,” Dennis (and giant pigeon cohost Reggie) bring listeners on a weekend adventure brimming with humor, science, and audience participation. They kick things off with silly banter and fan reviews, then replay the classic Wow in the World episode "G-Force vs. Wasabi: How the Brain Registers Pain," featuring Mindy Thomas and Guy Raz. The focus today: why and how some creatures, like mole rats, are immune to the pain from spicy foods—plus what that might teach us about pain, nerves, and the wonders of science!

Key Segments & Discussion Points

1. Opening Antics and Viewer Reviews

[01:52–04:58]

• Dennis sings the new “WeWow on the Weekend” theme song and discusses minty-fresh dental floss and “snackies” stuck in his teeth, setting a whimsical, relatable tone.
• Fan Review Highlight:
  • Username: “ilovereggie” wishes Reggie had his own segment.
  • Dennis prompts Reggie to improvise a "Reggie Report" ('the news,' featuring weather so wild you'd need both a snowsuit and swimsuit!).
  • “Okay, I’ll admit it. Reggie is good at segments.” (Dennis, 05:24)
• The segment gently introduces themes of creativity and audience engagement.

2. Inside Tinkercast Studios: "G-Force vs. Wasabi"

[06:26–27:04]

• Episode Setup: Dennis announces the relisten of a favorite scientific adventure about peppers, wasabi, and the science of pain resistance.
• Mindy and Guy Raz prep for the Hot Pickle and Pepper Championships, with side tales about pet rescue sharks and the infamous “motor pickle” ride.
• Comic Moments:
  • “Pet baby shark? What the…” (Guy Raz, 10:37)
  • “Cradling a baby rescue shark in my arms?” (Mindy, 11:06)
  • “Well, I did install a sidecar on the motor pickle…” (Mindy, 12:41)

Science at the Competition

• Capsaicin & Peppers:
  • Explanation of capsaicin—the compound making peppers hot.
  • Jalapeños register 4,000 on the Scoville Scale; today’s championship peppers go up to 2 million!
    • “The peppers that these competitors will eat… measure in at closer to 2 million on the heat scale.” (Mindy, 16:27)
• Meet the Competitors:
  • Grandma G Force: Returning champ, known for withstanding spiciest peppers.
  • Nelson the Naked Mole Rat: Scientists have shown naked mole rats don’t feel pain from capsaicin.
    • “You can literally roll Nelson around in a pool of Carolina reapers and he won’t feel a thing.” (Guy Raz, 17:35)
  • Peppers swapped for wasabi—introducing a different type of pain compound: AITC (allyl isothiocyanate).
    • "Wasabi doesn’t have the same chemical compounds [as chilies]. It actually has a different chemical… AITC.” (Guy Raz, 18:51)
• Neuroscience Connection:
  • Capasicin and AITC trigger pain by activating different neuronal pathways.
  • Naked mole rats immune to capsaicin, but still susceptible to AITC.
    • “Naked mole rats just don’t have the neurons... that tell them a hot pepper is… painfully uncomfortable.” (Guy Raz, 17:44)
  • The twist: Harold, a highveld mole rat, is introduced:
    • Highveld mole rats found immune to wasabi/AITC pain as well (unlike their naked cousins).
    • “I think the reason why is because Harold’s brain is designed to block the sensation… when we eat wasabi.” (Guy Raz, 22:55)

3. Scientific Deep-Dive: The Evolution of Pain Immunity

[23:06–26:55]

• Experimental Evidence:
  • Dr. Gary Lewin’s lab in Berlin studied why some mole rats feel no pain.
  • Highveld mole rats’ neurons have a sort of “escape hatch” so the painful chemicals can’t trigger the pain signal.
    • “That escape hatch allows all of those AITC chemicals to escape… before they’re able to send a signal… that it should feel pain.” (Guy Raz, 24:23)
• Evolutionary Backdrop:
  • Highveld mole rats share burrows with stinging ants (natal droptails); evolved pain immunity against their stings—also rich in AITC-like chemicals.
    • “Their bodies evolved… to make them resistant to those painful ant stings.” (Mindy, 25:27)
• Real-World Applications:
  • Discoveries in mole rat neurology may offer breakthroughs for pain management in humans, such as during surgeries.
    • "Maybe we could figure out how to trick the neurons in our brains to not notice certain types of pain?" (Mindy, 25:56)

4. Whimsical Wrap-Up & Dennis’ Extended Cut

[27:04–29:31]

• Dennis recaps his own “day at the Peppers championship,” including sneaking into the arena, singing “Dennis Shark doo doo doo doo,” and mistaking wasabi for mint ice cream.
  • “I ate a big spoonful and then I screamed and sneezed… and wasabi blew out of my nose.” (Dennis, 27:39)
• Team decides to “train” by eating sushi—with wasabi, naturally.
• Advice for listeners: call in with questions, enjoy fun ways to eat sushi (sushi kebab, anyone?), and keep science weird and wonderful.

Notable Quotes & Memorable Moments

• “Minty dental floss makes my friendship bracelets minty fresh.”
  —Dennis ([02:36])

• “What’s today’s date? It’s April 1st, isn’t it? April Fools, Guy Razzie.”
  —Mindy ([00:51])

• “Capsaicin… is that natural chemical that gives hot peppers their burn.”
  —Mindy ([15:54])

• “Are you telling me that… you can literally roll Nelson around in a pool of Carolina reapers and he won’t feel a thing?”
  —Guy Raz ([17:35])

• “Wasabi doesn’t have the same chemical compounds of chilies. It actually has a different chemical called allyl isothiocyanate or AITC.”
  —Guy Raz ([18:51])

• “That escape hatch allows all of those AITC chemicals to escape… before they’re able to send a signal… that it should feel pain.”
  —Guy Raz ([24:23])

• “Maybe we could figure out how to trick the neurons in our brains to not notice certain types of pain?”
  —Mindy ([25:56])

• “This one time, I mistook a bowl of wasabi for mint ice cream.”
  —Dennis ([27:39])

Timestamps for Important Segments

• [01:52] — Show proper begins: “WeWow on the Weekend” intro theme, banter with Dennis & Reggie
• [04:59] — Reggie’s News Segment ("The Reggie Report")
• [06:26] — Inside Tinkercast Studios segue to "G-Force vs. Wasabi"
• [15:36–18:00] — Capsaicin, Scoville scale, Naked Mole Rat explanation
• [18:42] — Wasabi is introduced; AITC science, comparison with peppers
• [21:23–22:55] — Harold the highveld mole rat triumphs, science deep dive
• [24:23–25:44] — Escape hatch in neurons, evolution, ant stings
• [25:56] — Future of pain research/implications for human health
• [27:04–29:00] — Dennis’s “Extended Cut” and behind-the-scenes stories
• [29:31–31:00+] — Listener call-in invitation, final wrap-up

Episode Tone & Takeaways

The episode is playful, imaginative, and packed with wordplay and character antics. Underneath the fun, Mindy and Guy Raz seamlessly introduce core neuroscience concepts—pain receptors, chemical signaling, evolution, species adaptation, and medical implications—making the science accessible and engaging for kids and families.

Main takeaway:
Nature is full of surprises—from pain-proof mole rats to spicy plants—and science explains not only what happens, but sometimes how we might use those wild abilities to help people.

For Further Wow-ing

Listeners are encouraged to ask questions, try STEM activities, and keep experimenting. As always: when it comes to science and curiosity, “Who wows? I wow!”