"People who have more melanin are more protected from the sun's harsh rays, because the pigment is like a sunscreen. This is good because UV rays can take away important folic acid that's needed for a healthy body. This adaptation in skin color was evolution's way of protecting our ancestors from the sun, and then they passed their skin color on to us."
"A good analogy describing the three types of transparency is this:Transparent pigment is like the window in your bathroom
semi transparent is like the glass in the shower door
opaque is like the door to the bathroom."
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.