The largest earthworm on record was found in South Africa and measured 22 feet.
151
In 1949, an official boxing match between a bear and a man was held. The bear won.
41
The elephant brain weighs about 6,000g.
274
The CIA once spent $20 million on a cat equipped with gear to spy on the Soviets, but it was hit by a taxi.
328
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23