Human corpses decay alfresco, all in the name of forensic science.
Your worn shoe soles reveal whether your feet roll excessively from side to side as you walk.
Build a mirrored tube that lets you see around corners and over walls.
With polarized light, you can make a stained glass window without gla
Before there were clocks, people used shadows to tell time!
Si mira fijamente este punto por algunos momentos, �ste desaparece.
Most people abhor the sound of their own recorded voice. So what are these recording devices doing to our voices to make them sound so awful?
Listen to bird songs and try to figure out which are songs, which are companion calls, and which are alarms.
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