People have been leaving messages on bathroom walls for thousands of years,just google'ancient Roman bathroom graphy'.Well,we are not the only ones to use the ? for information exchange.As two German researchers has confirmed after thousands of hours watching lemurs pee and poop for science.Primtologist Armish Josher and Peter Kepler concentrated on seven sets of pair-bonded members of the species called 'white-footed sport of lemurs' at a nature reserve in southern Madagascar.

Their report wrote in the journal that their behavior ? and sociobiology.Many animals ust the same spot repeatedly to do their business,primates in particular.For these lemurs a specific tree becomes the urine and feces foco point.And because the chemical compounds in their waste transmitted information,the so-called 'the ? tree' becomes like a bulletin board to post messages for the rest of the community.They stuned their 1097 hours of observations,the researchers concluded that the urine and granular secretions left on the tree trunk are the primary message vehicles.Feces mostly just collect on the ground.Some urine telegrames were probably signals from a particularly ? neighbour 'here she is around'.But male lemurs uped their latrine visits when potential competitors for females came into their home area.So the frequent chemical messages left on the tree probably say in that case 'bazzar,buddy,she is with me' in lemur.

Thanks for the minute for Scientific American 60-second Science,I'm Steve Mersky.