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MONDAY, NOVEMBER 23, 2009
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7

Apes, Humans Share a Laugh

Commonalities show laughter is pre-human

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(Newser) – After tickling two dozen apes and several children, scientists have concluded that laughter developed long before humans did. In fact, a common ancestor of both apes and humans probably emitted the first chuckle at least 10 million years ago. The study measuring 800 vocalizations found that all subjects shared the same central and peak frequencies. Chimps and bonobos—closest to humans in the evolutionary tree—laughed in a short series, like humans, the BBC reports.

"When humans laugh, they voice stable sounds: that means the vocal folds are moving in a very regular synchronized way," said one researcher. "We found these acoustic properties also in bonobos." The findings are "fun but not all that surprising," an evolutionary anthropologist says. The real question: Does laughter mean the same thing among the different species? More tickling awaits.

In this 2005 photo provided by the University of Portsmouth, England, baby orangutan Naru laughs while being tickled, in Sabah, Malaysian Borneo.
In this 2005 photo provided by the University of Portsmouth, England, baby orangutan Naru laughs while being tickled, in Sabah, Malaysian Borneo.   (AP Photo/University of Portsmouth, Miriam Wessels)
In this 2005 photo provided by the University of Portsmouth, England, baby orangutan Enero laughs while being tickled in Sabah, Malaysian Borneo.
In this 2005 photo provided by the University of Portsmouth, England, baby orangutan Enero laughs while being tickled in Sabah, Malaysian Borneo.   (AP Photo/University of Portsmouth, Dr. Marina Davila Ross)
In this 2007 photo provided by the University of Portsmouth, England, Dr Marina Davila Ross tickles a chimpanzee called Karla in Zambia.
In this 2007 photo provided by the University of Portsmouth, England, Dr Marina Davila Ross tickles a chimpanzee called Karla in Zambia.   (AP Photo/University of Portsmouth)
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We have various findings showing that human laughter is deeply rooted in human biology, because, for example, it's present in various cultures, in deaf and blind children.
- Marina Davila-Ross, lead author

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7 comments
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Rob
Jun 4, 09 2:26 PM CDT
Meaning and action may be very different. But a monkey can laugh in situations that are completely understandable to humans. And recent research has shown that rat pups laugh when tickled too. Researchers searching for the origins of laughter need to look farther than the common ancestor of humans and apes. Reply
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IN RESPONSE:
Rob
Jun 4, 09 9:21 PM CDT
minus one. hahaha
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-1
RobN
Jun 4, 09 3:52 PM CDT
I know I shall sleep safer at night knowing that the evolution of the laugh by primates is being researched using somebody's tax dollars. Reply
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0
IN RESPONSE:
Rob
Jun 4, 09 9:25 PM CDT
What it shows is the relationship between humans and other animals. Laughter, per se, isn't the issue; it's phylogeny.
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IN RESPONSE:
anchower
Jun 5, 09 12:00 AM CDT
Hey, jacktard: The study's from Britain. None of your precious tax dollars funded it. What they are paying for, though, is the war in Iraq and the fallout from market anarchy (i.e., what people like you call "the free market").
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