science!
This is an IR photo of skunk cabbage in the wetland next to our office. They are a plant which can generate it's own heat, and thus is one of the first things to come up in the spring. The temperature outside is about 48 but inside the plant it's about 70. Apparently the process that they use to do this is similar to what animals do when they metabolize brown fat. The process uses sugars to generate heat but no ATP (which is what's normally produced during regular metabolism.) The heat also lets the nasty skunk cabbage smell to intensify and waft on the air to attract carrion eating flies which pollinate the flowers.
Anyway, this was a kind of fun thing to do this afternoon but i crashed my computer downloading the pictures...