How do gecko feet stick to walls?

What Crafty Clover says in this video

Intro

Hi there, curious minds! I'm Crafty Clover! Let's discover something amazing. How do gecko feet stick to walls?

The Big Idea

Geckos can run straight up walls! They don't use glue or suction cups. So how do they stick?

Millions of Hairs

Step one: Millions of Hairs. A gecko's toes are covered with millions of tiny hairs. Each hair splits into even tinier tips.

Strong Grip

Step two: Strong Grip. These tips get so close to the wall that weak attractions between molecules add up to a strong grip. No glue is needed.

Peeling Off

Step three: Peeling Off. The gecko peels its foot off by changing the angle. Scientists have made gecko-inspired tapes that stick and release many times without glue.

A Closer Look

Let's take a closer look! Pads cover toes. Hairs cover pads. Tips split smaller. Attraction holds tight.

Quick Facts

Quick facts! A gecko can hang on a smooth glass wall. Gecko feet stay clean. Gecko tape is reusable. They climb ceilings.

Think Like a Scientist

Now, think like a scientist! Touch a piece of tape to dusty cloth. Then touch it to a clean surface. Does it still stick well? What does dirt do to stickiness? Geckos' feet stay clean, which helps them grip.

Outro

Gecko feet stick to walls because millions of tiny hairs with even tinier tips get so close that weak molecule attractions add up. Scientists copy this for reusable gecko tape. Science is amazing! Keep asking questions! The more you look around, the more wonders you will find, so keep your eyes open! Crafty Clover can be found on Amazon Books, Google Bookstore, and Apple Books. Available for purchase or download! Bye for now!