8 years ago
1
New Kind Of Material Stores Heat Until You Squeeze It
Even after night falls, a slab of concrete or asphalt might still feel warm to the touch. The surface has stored up heat after a long day of sitting out in the sun, and is slowly letting it go. It's something that happens naturally all over the world, but what if there were a way to control the process?
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I learnt from a physics professor once that if you took sand from a beach and into your kitchen, you could put the sand on the stove and you would see a faint glow in the dark due to the cosmic rays absorbed by the sand over time.