Like Many,

I guess we have all heard,

of the Hatter, who was sometimes described as mad, but I had never heard of a mad haterpillar, until today, the caterpillar that will eventually turn into the moth Uraba lugens is called the mad haterpillar because it grows its own hat, out of its own shed exoskeletons! this video is really only a couple of minutes long, then host Steve Mould discusses future episodes, which you can see here, if you like odd and sometimes quirky science based 'experiments' this is the place for you.