nervous system


The stone marked by the arrow looked very green when I found it, although it was really grey. Why does the color look different?


Here's a llama. There's a llama. If you have ever heard the , Llama Song , you are probably familiar with having a song stuck in your head that just won't go away. What is the scientific name for this?

Curves Illusion

This is an optical illusion that I first saw as part of a kit of magic tricks that I received as a present when I was young. The kit was designed for children, so most of the "tricks" were things that did not take a lot of skill. Like many other magic tricks, this one relies on science instead of sleight of hand.