animals Watch a slug's self-decapitated head crawl around as it grows an entire new body David Pescovitz
Delightful Creatures "Please refrain from licking" toads, says National Park Service in unusual warning Carla Sinclair
parasites Hawaii reports three more cases of parasitic worms that burrow into human brains Mark Frauenfelder
happy mutants Buskers are the only performers making money at the Edinburgh Fringe. Here's how. Mat Ricardo