" Ask students why we have different amounts of melanin in our skin. Inform them that melanin is like a curtain in our skin-it protects our skin from the sun's ray. We need some sun to help our bodies make and use vitamins, but too much sun will burn our skin. What color we are depends on our ancestry. White people originated in western European parts of the world, where it was colder. That area did not have much bright sunlight, so people in that area developed skin with less melanin to take advantage of the smaller amount of available sunlight."
"Until now, we thought chameleons changed colour by moving packets of melanin – the same pigment that gives our skin, hair and eyes their colour – around on their skin. Melanin is like a stage curtain that the chameleon can pull across to conceal brightly coloured skin cells filled with red, blue or yellow pigments. Changing which coloured cells are "on stage" determines the chameleon's colour."
METAMIA is a free database of analogy and metaphor. Anyone can contribute or search. The subject matter can be anything. Science is popular, but poetry is encouraged. The goal is to integrate our fluid muses with the stark literalism of a relational database. Metamia is like a girdle for your muses, a cognitive girdle.