How Gecko Feet Work | How Things Work with Kamri Noel

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In this lesson, we explore how geckos, like Kamri’s pet Apollo, are able to climb walls without claws or sticky substances. The secret lies in their feet, which are covered in millions of tiny hair-like structures called setae that create a strong grip on surfaces through their split ends. This unique adaptation allows geckos to move effortlessly and explore their environment.
  1. What special things do geckos have on their feet that help them climb walls?
  2. How do the tiny hairs on a gecko’s toes work together to help them stick to surfaces?
  3. Why do you think geckos like to explore their surroundings, just like Apollo did?

How Do Geckos Climb Walls?

Hey there! Today, we’re going to learn something super cool about nature. Have you ever seen a gecko climb up a wall and wondered how they do it? Well, let me tell you all about it!

Meet Apollo the Gecko

Kamri has a pet gecko named Apollo. Apollo can climb on almost anything, but he doesn’t have claws or sticky slime like some other animals. So, how does he do it? Let’s find out!

The Secret of Gecko Feet

Kamri asked an expert named David Gruber to help explain how geckos climb. David showed Kamri some amazing photos of gecko feet. It turns out that each gecko toe has millions of tiny hair-like structures called setae.

What Are Setae?

Setae are super thin, even thinner than a human hair. These tiny hairs help geckos stick to surfaces. When Apollo takes a step, the setae flatten to make close contact with the wall. This creates a larger area for sticking!

The Magic of Split Ends

At the tip of each setae, there are hundreds of split ends. While split ends might not be great for our hair, geckos love them! These split ends fan out and grip the surface. Even though one hair isn’t very strong, all of them together help Apollo cling to walls and move wherever he wants.

Where’s Apollo Going?

Kamri noticed that Apollo was heading under the radiator. Geckos are always on the move, exploring their surroundings. Now you know the secret behind their amazing climbing skills!

If you want to learn more cool things about how stuff works, check out other episodes and subscribe to Nat Geo Kids. See you next time!

  • Have you ever seen a gecko or another animal climb up a wall or a tree? What do you think makes them so good at climbing?
  • If you could have a special ability like a gecko, what would you like to be able to do, and why?
  • Can you think of other animals that have special features or abilities that help them in their environment? How do those features help them survive?
  • Gecko Feet Experiment: Try this fun experiment to understand how gecko feet work! Take a piece of tape and stick it to different surfaces like a wall, a table, or a book. Notice how it sticks better to some surfaces than others. Now imagine the tape is like the setae on a gecko’s feet. Discuss with a friend or family member why you think the tape sticks better to some surfaces. How do you think the setae help geckos climb different surfaces?
  • Setae Art Project: Create your own gecko foot art! Use a magnifying glass to look closely at a piece of fabric or a leaf. Notice the tiny fibers or veins. Draw what you see and imagine these are like the setae on a gecko’s foot. Use colored pencils or crayons to add split ends to your drawing. Share your artwork with the class and explain how these tiny structures help geckos climb.
  • Observation Walk: Go on a short walk around your home or school and look for surfaces that a gecko might climb. Make a list of these surfaces and think about why a gecko would or wouldn’t be able to climb them. For example, would a gecko be able to climb a glass window or a rough brick wall? Discuss your findings with a classmate and think about how the setae would work on each surface.

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