Next time that someone says that you're glowing, check that they don't mean it literally. Researchers in Japan have finally managed to prove the existence of the human body's bioluminescence with these first-ever pictures of the body's natural shine.

It's like a scene from an Aliens movie: a scaly underwater creature looking something like a piranha crossed with a python strikes at its prey which is then reeled deeper into the beast's throat by a second set of toothy jaws.

An interesting illustration of prosopagnosia, using rocks.

Every time we fall in love, fight with our spouse, get upset about the influx of immigrants into our country, or go to church, we are, in part, behaving as a human animal with our own unique evolved nature—human nature.

In NATURE's DEEP JUNGLE: MONSTERS OF THE FOREST, spider expert Martin Nicholas travels to South America's Amazon in search of a spider known as the chicken-eating spider.

Just as the mouse brain is a lizard brain "with some extra stuff thrown on top," Linden writes, the human brain is essentially a mouse brain with extra toppings. That's how we wound up with two vision systems.