The platypus has always been considered odd. Not only does it have webbed feet, a tail like a beaver’s, a coat of fur, and a large bill, but it also lays eggs and nurses its offspring through a set of glands on its abdomen. Biologists classify the platypus as a monotreme, an egg-laying mammal with a single opening for reproduction and excretion. But is it truly a mammal? http://louis0j0sheehan0esquire.wordpress.com

A draft of the genetic sequence of Glennie [subscription required], a