What sets Homo sapiens apart from other animals? Among other things, our chins do. That piece of bone sticking out from your jaw is somewhat of a mystery - one that's inspired a diversity of wild theories to explain its purpose, according to a paper published this month in Evolutionary Anthropology.

The author of the paper dismisses a number of these explanations, such as the possibility that the chin serves as a sexual signal (such traits usually only appear in one sex - like the mane of a male lion). Another proposal is that the chin acts to protect your throat - an idea the paper's author also shoots down, because for this to be a substantial advantage, humans would have to be constantly punching each other in the face.

So the mystery rem ...

Which of these faces looks more trustworthy to you?

Science says that some people just get away with more stuff, because they have more trustworthy looking faces.

A trustworthy face, as psychologists have determined over years of research in this area, has two major characteristics: The eyebrows are slightly lifted, so that together, they form a kind of upside-down V shape; likewise, the corners of the mouth are also lifted slightly. An untrustworthy face, on the other hand, is the opposite: The eyebrows point slightly downward, forming a V shape, and the corners of the mouth are turned down a bit, too.

Source: http://nymag.com/scienceofus/2015/01/some-faces-just-get-away-with-stuff.html ...