20% of our bodyheat is lost through the head. So wrap up warm this winter and wear a hat. The hat traps a layer of air, which insulates your head. It also reflects heat from your body back to you and therefore keeps you warmer. Why does wearing layers help keep us warm? For similar reasons to the hat: the layers of clothing trap layers of air, which help insulate us. Even animals need to keep warm. Whales and seals depend on a thick layer of body fat called blubber, which on a whale can be 60cm thick!

	Does fat really keep us warm? Make yourself a blubber glove and discover what it’s like to be a whale…
	Take two plastic bags.
	Place some lard into the first bag.
	Place a free hand into the second (clean) bag.
	Now put your bag-covered hand into the lardy bag (are you following this…? you better be or things could get messy!)
	Move you hand around so the lard gets spread out over your ‘glove’.
	Seal the tops of the bags together with tape to ensure the lard doesn’t escape.
	Now your hand has been "whale-ified" hold an ice cube in your glove – you shouldn’t feel it.