1. When the platypus was first examined by a scientist, the researcher thought he was being pranked, saying "of all the Mammalia yet known, it seems the most extraordinary in its conformation; exhibiting the perfect resemblance of the beak of a duck engrafted on the head of a quadruped... I almost doubted the testimony of my own eyes with respect to the structure of this animal's beak."
2. The platypus, which hunts in water, finds prey by solely picking up on electric currents received through its bill. From these signals, the platypus can hone in on its prey. A platypus' bill is so sensitive, it can even sense a small battery at the bottom of a river.