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This is Scientific American's 60-Second Science. I'm Steve Mirsky. Got a minute?

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People have been leaving messages on bathroom walls for thousands of years.

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Just google "ancient Roman bathroom graffiti."

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But we're not the only ones to use latrines for information exchange,

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as two German researchers have confirmed after hundreds of hours watching lemurs pee and poop.

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For science.

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Primatologists Iris Dr?scher and Peter Kappeler concentrated on seven sets of pair-bonded members of a species called white-footed sportive lemurs, at a nature reserve in southern Madagascar.

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Their report is in the journal Behavioral Ecology and Sociobiology.

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Many animals use the same spots repeatedly to do their business, primates in particular.

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For these lemurs, a specific tree becomes the urine and feces focal point.

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And because chemical compounds in their waste transmit information, the so-called latrine tree becomes like a bulletin board to post messages for the rest of the community.

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Based on their 1,097 hours of observations, the researchers conclude that urine and glandular secretions left on the tree trunk are the primary message vehicles.

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Feces mostly just collects on the ground.

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Some urine telegrams are probably signals from a particular lemur to the neighbors that he or she is around.

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But male lemurs upped their latrine visits when potential competitors for females came into their home area.

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So the frequent chemical messages left on the tree probably say in that case, "Buzz off, buddy, she's with me." In lemur.

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Thanks for the minute, for Scientific American's 60-Second Science. I'm Steve Mirsky.

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