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What the Heck Is This?

Some people let it all hang out. So do some animals.

Not sure what this is? Bet you can at least get close with a guess.

It's a couple orangutans smooching. You can see the full image below. These primates actually do many things that humans do, which is why they were for so long so popular in Hollywood. Did you know orangutans can whistle? They can even play charades, using gestures to get a point across. They're also one of several animals — including dolphins and elephants — that use tools.

Some scientists say orangutans, not chimps, may be human's closest relatives.

I don't know why other primates kiss, but scientists say one reason why humans kiss is that, evolutionarily speaking, we can learn a lot about a potential mate from the mouth and nose — saliva and breath carry clues we don't want to miss  about a person's fitness for making and nurturing offspring.

Got a strange or interesting photo related to science, nature or technology? What the Heck, send it to me and maybe I'll use it. And you follow me on Twitter or Facebook.

(Image credit: Digitaldave Dreamstime.com)
Robert Roy Britt
Rob was a writer and editor at Space.com starting in 1999. He served as managing editor of Live Science at its launch in 2004. He is now Chief Content Officer overseeing media properties for the sites’ parent company, Purch. Prior to joining the company, Rob was an editor at The Star-Ledger in New Jersey, and in 1998 he was founder and editor of the science news website ExploreZone. He has a journalism degree from Humboldt State University in California.