The box jellyfish shows us that evolution is able to produce eyes in more than one way.
Scientists found that nearly identical genes play key roles in the formation of the eyes in mammals and fruit flies.
Those tiny dots are actually blood cells moving in the retina of your eye.
It would probably make a pretty cheesy horror movie, but the thing is, it's true. In fact, that creature with the extra brain is you.
Why not 5 or 15? Why is 10 the magic number when it comes to fingers and toes?
Before about 360 million years ago, no vertebrates had limbs. They all shared the same fish-like body shape. But around that time something exciting happened.
Today's Moment of Science is about the damage done to fish ears by very loud man-made sounds.