Echidna

Natalie Angier elucidates the enigmatic echidna (a mysterious monotreme related to the duck-billed platypus) here:

http://www.nytimes.com/2009/06/09/science/09angi.html


And a special bonus video today for sheer entertainment....
Not exactly science, but too good (and uplifting) not to pass along --- I'm a sucker for acoustic guitar playing, but had never seen or heard of Tony Melendez, armless since birth; was blown away when I stumbled upon this video: