goosebumps? Well Harry, they are actually evidence of our hairy past. We are known as

the naked apes and you can kindof see a little bit why. But even more so if you look at our

primate relative who are a particular furry bunch.

Cool fact for you, most of the hair we have in the past we still have now. It's just been

highly miniaturised. If you have a look at each hair follicle connected to each one is

a piloerector muscle. Now if we feel cold or if something goes bump in the night and

we feel intensive fear then that piloerector muscle shoots that hair out. Why? Well again

we need to look at our primate friends for this. If we feel cold, the hair stands up

on end, and for our little guy there, that traps a layer of air around his skin. Essentially

a layer of insulation. Not much use to us really anymore, we just pop on a jumper or

a fleece if that happens. What about the fear? Well the adrenalin response

fires up those hairs and it actually makes the animal look a bit bigger so the predator

that was attacking it goes huuhhhhh??? And in that little moment of time they can either

run off or they can launch an attack on their predator. It's the fight or flight response.

Again, not really that useful for us anymore we just end up looking like the last plucked

turkey in the shop window at Christmas. So there you go Harry, I hope that answers that

one, I hope you enjoyed it. If you got any ideas for any of the other

head squeeze strands, you want the guys to do? Maybe a big experiment? Or something like

that? Pop it below. If you haven't subscribed give us a sub cause these will drop straight

in to your feed. And until next time happy head squeezing.