vision

You're driving down the highway on a beautiful day as your child looks out the window. She asks, "Why is the sun following us?"

Here's a simple demonstration you can do with cool implications. Find a large object that is brightly colored, like a green door. Stand with that door to your side, but don't look directly at it.

If you've ever had a bird feeder, you've probably noticed how much more colorful hummingbirds are compared to other birds. So how are hummingbirds so colorful, anyway? What makes their feathers so special?

Harvard neuroscientist Margaret Livingstone is pretty sure she's solved the puzzle of the Mona Lisa's changing smile. Presuming nothing, Livingstone reasoned that the famous portrait's flickering smile is caused by the way we see.

Since we have two eyes, why is it that we don't see two of everything? We seem to see like the cyclops in Greek mythology, as if we had one eye on our forehead.

An international team of neuroscientists has discovered how cuttlefish see in three dimensions. First of all, a cuttlefish isn't really a fish. The animals are closely related to octopuses and squids and part of a group called cephalopods.

Things are not always as they seem, and this little demonstration will prove it. All you need is a cup of black coffee and an overhead light.