Why shaving dulls even the sharpest of razors

Razors, scalpels, and knives are commonly made from stainless steel, honed to a razor-sharp edge and coated with even harder materials such as diamond-like carbon. However, knives require regular sharpening, while razors ...

Swimming led to flying, physicists say

(PhysOrg.com) -- Like a fish paddles its pectoral fins to swim through water, flying insects use the same physics laws to "paddle" through the air, say Cornell physicists.

Dyson Unveils His Bladeless Fan (w/ Videos)

(PhysOrg.com) -- James Dyson, inventor of the bag-less vacuum cleaners has taken his invention one step further with the unveiling of the bladeless fan. Using 'Air Multiplier' technology the bladeless fan pushes 119 gallons ...

Wind turbine blades could someday be recycled into sweet treats

Wind power is an increasingly popular form of renewable energy. However, when it's time to replace the huge turbine blades that convert wind into electricity, disposal is a problem. Now, scientists report a new composite ...

Helicopters flying at Mars may glow at dusk

The whirling blades on drones flying above Mars may cause tiny electric currents to flow in the Martian atmosphere, according to a NASA study. These currents, if large enough, might cause the air surrounding the craft to ...

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