Blood-Powered Devices

Blood-Powered Devices

Nearly all our electricity comes from mechanical energy; a flow of liquid or gas passes a propeller or similar device, which spins magnets in a coil of wire to produce an electrical current. This is the basic technology behind hydroelectric, coal, gas, nuclear, and...
Terahertz Scanner from Carbon Nanotubes

Terahertz Scanner from Carbon Nanotubes

One of the most useful types of technology in medicine is the kind that lets doctors look inside the human body. X-rays images are one of the most familiar, but ultrasound and other methods are also used. There is growing interest in “terahertz” imaging...
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