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[The Science of Mosquito Attraction and the Dangers of Feeding Ducks]-[Mosquitoes, Stinky Socks, And Bread....Oh MY!]

Wow in the World · B1 · 2017-07-17

Preschool Enlightenment
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📋 Summary

The Mystery of Mosquito Attraction

In this episode of Wow in the World, hosts Mindy and Guy Raz explore the fascinating scientific question: why are some people "mosquito magnets" while others remain untouched? The discussion centers on the work of Professor James Logan, a medical entomologist at the London School of Hygiene and Tropical Medicine.

Why Do Mosquitoes Bite?

Mosquitoes are drawn to humans through a variety of sensory cues. Scientific studies suggest that factors such as body odor, sweat, and higher body temperatures play a significant role in attraction. A key element is the emission of carbon dioxide. Humans release carbon dioxide every time they breathe, and female mosquitoes utilize specialized sensors called "CPA neurons" to detect this gas. Consequently, larger or taller individuals, who tend to exhale more carbon dioxide, may be more prone to mosquito bites.

The Role of Genetics

Professor Logan’s research posits that genetics—the characteristics passed down through our DNA—may be the deciding factor in why mosquitoes prefer certain hosts. To investigate this, researchers conducted a study involving 40 sets of twins. Because identical twins share more of the same genetic code and often possess a more similar body scent than non-identical twins, they served as the perfect subjects. The findings revealed that if mosquitoes were attracted to one identical twin, they were highly likely to be attracted to the other, suggesting a strong genetic link to mosquito appeal.

The "Stinky Sock" Experiment

To further understand this phenomenon, scientists are launching a unique experiment involving 100 sets of twins from the UK and Gambia. They plan to place "stinky socks" worn by these twins into a wind tunnel to observe which scents attract mosquitoes most effectively. By analyzing the chemical "recipe" of the odors and comparing the DNA of the participants, researchers hope to eventually develop pills or medicines to help protect humans from mosquito-borne diseases.

The Hazards of Feeding Ducks

The show also addresses a common human habit: feeding bread to ducks. While it may seem like a kind gesture, Guy Raz explains that it is actually harmful. Bread lacks nutritional value for ducks, functioning essentially as "junk food." Relying on bread can lead to a condition called "angel wing," a deformity in baby ducks that prevents their wings from developing properly, often leaving them unable to fly.

Instead of processed bread, experts recommend healthier alternatives if one feels compelled to feed local wildlife, such as kale, corn, or oats. However, the hosts conclude that simply observing and enjoying nature without interference is often the best way to interact with the environment.

Through these lighthearted yet educational segments, Wow in the World emphasizes how scientific curiosity—whether it involves wind tunnels for socks or observing pond life—helps us better understand and care for the world around us.

🎯Key Sentences

1
It's going to be a November to remember.
2
But for now, let's get on with the show.
3
Mindy, these mosquitoes are trying to eat me alive.
4
Yeah, they are really going for it.
5
Well, consider yourself lucky, Mindy.
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📝Key Phrases

1
music to your ears
2
get on with the show
3
eat me alive
4
going for it
5
take offense to
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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 got to 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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