Incredibly, the accuracy rate was just as high as when the same participants were asked to gauge people's personalities from watching a video of them. That's right -- your body odor is just as indicative of who you are as your speech or mannerisms. But it goes further than that. Researchers are discovering that each person's individual smell is so unique that it's almost like a fingerprint, unique enough that it could serve as a really unpleasant alternative to DNA analysis. Here's hoping that whatever detection method they come up with involves a machine of some kind so we don't have to conduct lineups by sniffing a bunch of underwear.

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"So what are you in for?" *sniff* "Lifting Taylor Swift CDs, huh?"

Or maybe we could just sniff the suspects and see which one seems the most nervous. Yeah, your nose can do that, too -- researchers did another study where they strapped a bunch of gauze pads to participants' armpits to collect their sweat while they watched horror movies. Then they taped the fear-sweat-soaked gauze under the noses of a second set of participants. Those subjects were then shown pictures of faces with completely blank expressions, and scientists found that people exposed to the "fear" sweat were more likely to guess that the expressionless faces were fearful.

Another study was done where they collected the sweat from treadmill runners and compared it with the sweat from skydivers. The skydiver sweat, presumably loaded with terror essence, was shown to light up areas of the brain associated with fear, while the runners' sweat simply smelled awful. At this point we assume that everyone went home and showered for three hours.

Here's a challenge for you: Try to imagine a new color. One that you've never seen before. Just straight invent one. Can't do it, right? You probably figure it's because you've already seen all the colors that are possible. Well, prepare to have your mind blown -- there are lots of new colors out there, we just don't ordinarily have the ability to see them, so describing them to you would be like trying to describe sight to a blind person. And we say you can't ordinarily see them, because science has figured out a way.

"Orangenta's pretty badass, but you really can't beat purpilver."

In their incessant quest to break reality in ever more interesting ways, scientists successfully managed to show some people a "bluish yellow" color. We don't mean green. We can't really show you what we mean, because the way our eyes work is that when we see blue, the parts of the eye that detect yellow switch off, and vice versa. So it's not supposed to be possible to see a true mix of blue and yellow. Green is something else, the closest thing your brain can offer when you show it something that gets it all confused.

But scientists discovered that we can sense these and other colors that don't show up in the rainbow by fooling our eyes with certain composite patterns. For instance, when you see an image like this ...

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Still not seeing the sailboat.

... and cross your eyes like it's a Magic Eye puzzle, some people can see an entirely new color that is neither blue, nor yellow, nor green. Then again, some people just see a gradient blob of yellow and blue and assume they're the victims of some prank.

If you think we're just messing with you, there's an example of one such impossible color that most people can perceive without playing complicated tricks on their brain. We call it pink. Pink is an unholy mixture of red and violet that doesn't appear on the rainbow any more than bluish yellow does. Seeing pink is basically the color equivalent of seeing ghosts.

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Suck it, Haley.

And then, most amazingly, there are the very rare people who are born with the ability to see this world of new colors that the rest of us can't even imagine. These people are called tetrachromats, because they have four cones in their eyes instead of three like the rest of us. Each cone is responsible for seeing about 100 shades, so for us normal folk, that's about a million colors. But for tetrachromats? They see a hundred million colors. We should be thankful that it's rare, since it would make art class harder than AP history.

But that's not the most interesting thing they discovered -- in another study, when they showed women pictures of men's faces, the women who were on their period had incredible gaydar. And this isn't dumb coincidence -- a woman's ability to pick the gay guy out of a lineup peaked at her most fertile point, and then gradually receded until her next time of the month, and it didn't work at all for detecting lesbians.

Remember, they weren't being shown footage of these guys in line for a Celine Dion concert. Women were able to pick who was gay simply from looking dudes in the eyes. Supposedly, evolution figured that gaydar would be a really handy thing to have when you're a woman looking to start a family, just so you don't waste time with a dude who is going to leave you for your brother.

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"No way, I totally love vagina! With its ... you know, getting all up in there ... OK, yeah, I'm gay."

This is, of course, an ability limited to women. But the guys don't have to miss out, because ...

It's not as creepy as it sounds. When a woman is ovulating, she has very subtle changes in voice, scent and skin tone, all of which men pick up without even realizing it. To explore this, they paired 123 male participants with five women over different stages of their menstrual cycle. Each man had a one-on-one session with the woman (not in the way you think). They were prompted with a picture depicting a certain scenario, like a child giving another a toy, and the woman was asked to describe the situation.

The men were then asked to do the same thing. But what they found was that, when the women were less fertile, the men were more likely to be lazy and just copy what the woman said. But when the women were ovulating and thus more fertile, the men tended to shake it up a little and put more effort into their part. In other words, they were trying harder to impress them. Because they could smell their ovulation.

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"It is a child, a lonely child, who despite having little, bequeaths his sole treasure unto another."

OK, so it actually is as creepy as it sounds.