My friend Natalie asked me a question on Facebook:
How can a spider walk upsidedown on the ceiling?
That’s a great question. Different animals have different ways of sticking to walls and ceilings. Frogs, like the Chinese gliding frog, have sticky pads on their toes that have a sticky glue on them. Insects that can walk on walls and ceilings also have a glue on their toes.
Spiders are different. They don’t have glue on their toes. Instead, they have tiny little hairs on their toes. Here is a picture of the foot of a jumping spider. This picture was taken by a scientist with a scanning electron microscope. It is magnified 200 times.
There is some kind of law of physics that makes the molecules in these little hairs stick to the ceiling like a magnet. Scientists are studying spider feet to see if they can learn how to make things stick the same way that spiders stick to the ceiling. They are trying to make a better sticky note. You can learn more about it at this link.
Thanks for asking the question. Happy birthday, Natalie and Carter!