More Blogs - December 2011

stuartrosenthal's picture

Of rats and men

Scientists have long experimented on mice and rats to test new drugs and treatments for human illnesses.

bruben's picture

Downsize and do good

Shera, a lioness at the National Zoo, swipes a paw across a swirl of blue paint. Her claw punctures the paper. A volunteer quickly pulls the “painting” out of her enclosure before she can take a bite out of it, as lion cub Baruti likes to do with his artwork.