Shark why laugh?

Shark why laugh?

Yatesi (left) of the "smile shark" also help him to win a grand prize of photography.

Figure/CFP

In the summer of 2007, amateur photography enthusiasts yatesi (BruceYates) in Caribbean filming short Kiss lemon sharks.

In the photographs, yatesi found the shark swing to the right of the standard 45-degree angle pose, staring eyes grinned, very crafty.

Shark why laughing? this is really bad answer, because laughing scientist (gelotologist) were men and why you want to laugh funny answer to that is not a consensus.

Don't laugh, laugh learn really (gelotology) so a science in itself. Readers may disdain, people why laugh? Le chant! this is actually worse, laugh in fact also very complex.

Laughing without teeth are basic etiquette.

In fact, most of the mammals of the "language", was threatening open teeth or attacks signal. Wolves often do, dog will lift the upper lip, low head toothy, Binaural protraction.

Study on baby tell us that our first laugh about 3-4 months, but the object must be laughing her mother.

While laughing? want cannot speak little milk children laughing, 100 on accurate way is to put her/him throw up caught again. Catch Tickle meat is what it is from an unknown touch brings fear, then found however harmless acquaintances arm lifting of fear. Own Flex? unless you imagination too rich, you will not create fear; stranger? that's sexual harassment, fear will not be released. No fear, no smile.

Other animals will not be laughing? this depends on how you define.

Zoologists were discovered and we similar to several large primates have similar laugh response. Chimpanzees and orangutans "long-range Tickle meat" distribution is very similar to human beings: they like Flex armholes and belly. As a result of these apes of vocal cord structure is not the same as with humans, so they can only be God laughs, it's a little voice? Please recall the life of the big bang "Sheldon laughter ...

In 2005, the United States for three animal behavior scientist published an article entitled "play dog laughter evoked rescue stations dog pressure release related behavior".

These three they think dog laughter audio, to those who have been helping poor dog listening to the results of the dogs have heard back to the other dog in the room, make the dog's head in called "play of the bow" of the action. Joy is infectious, the dog also know. Dog laughter is what? than usual wheezing sound even more rapidly, like "Hei Hei Hei Hei", raising a dog friends understand.

In fact, the smile of animals far more than you think "low-level".

In 2003, two other United States biologists published papers the smile rat and human pleasure of evolutionary "shows us a cute little animals: they are addicted to tickling, rough-and-tumble smile. This animal is mouse, they laugh we hear that ultrasound.

Even so, I can bet that those two sharks at the beginning of the show is a kind of "Obama-smile" — just look laugh.

In fact, we were too easily that look like things that make laugh. Such as dolphins, the creator gave their innate upwards, making the corners of the marine mammal moderate image. In fact, not only sexual promiscuity into dolphins, but like indiscriminate. But in the minds of the Dolphin still smiling Angel.

□ Lean camel (Shandong animal researchers)