Bad Joke - and then some Facts

It doesn't take too long

Steve Irwin can't have been being Sunsmart that morning...
...why not?
If he had been wearing sunscreen, he would've been protected from harmful rays!

Told you it was bad.

Anyway (via Pharyngula) Rangel MD has some cold hard facts about stingray stings to tell you about nucleotidases and other toxins and their mode of action.