kattobing + ratio

[ID: Bugs Bunny in a suit meme, edited to read "I wish all Etruscan shrews a very pleasant brain-regrowing season."]

They’re the smallest mammal if you measure by mass, coming in at under 2g. That’s tiny.

Because they’re so small, their volume to surface area ratio is messed up, and they are constantly in danger of their body temperature dropping. Their very high metabolism is what keeps them alive.

Their brains can shrink by up to 28% over the winter, so that they don’t have to keep it warm and fed during the coldest season.

They don’t even live where it’s super cold — as the name suggests, they’re found around the Mediterranean, as well as in parts of Southeast Asia. But they’re very sensitive to the cold, on account of being tiny.