An elephant can hold more than 40 gallons of urine in it's giant bladder. And you'd think it would take a long time to empty a bladder that big, but you'd be wrong! It actually takes an elephant no longer than almost any other mammal in the animal kingdom. Why? Anthony explains.

Read More:
The Law of Urination: mammals take 21 seconds to pee
http://mobile.theverge.com/2013/10/19/4855076/the-law-of-urination-mammals-take-21-seconds-to-pee
"Researchers at the Georgia Institute of Technology have discovered a new golden rule: every mammal takes about 21 seconds to urinate. Patricia Yang and her co-authors dubbed it the "Law of Orientation" in a paper published this week, and they say it applies across a wide range of animal sizes."

Law of Urination: all mammals empty their bladders over the same duration
http://arxiv.org/abs/1310.3737
"The urinary system evolved to eject fluids from the body quickly and efficiently."

Universal law of urination found in mammals
http://www.newscientist.com/article/dn24425-universal-law-of-urination-found-in-mammals.html#.UmV8gZSaqvU
"You'll never look at Dumbo in the same way again. Elephants, cows, goats and dogs all take roughly 21 seconds to empty their bladders. A "law of urination" now explains the physics behind what happens when you just gotta go."

Morphometry of the aging female rat urethra
http://link.springer.com/article/10.1007%2FBF01895103
"Muscles in the limbs change with age, but the aging process of urethral muscles is unknown."

Watch More:
5 Nifty Ways to Use Pee:
http://www.youtube.com/watch?v=7GZXg6K70BU
Test Tube Wild Card:
http://testtube.com/dnews/dnews-467-tastedifferences?utm_source=YT&utm_medium=DNews&utm_campaign=DNWC
Breaking the Seal:
http://testtube.com/dnews/dnews-124-breaking-the-seal-fact-or-fiction
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