Pneumatic drills produce 90dB and more - as do some ... Research in 2013 found both high-powered 'jet-air' and warm air hand dryers spread bacteria into the air, onto users and onto those nearby.

Tenaciously, the astronaut worked the bolt with his pistol-grip hand drill until it came free, enabling him to attach the new 45-foot section to the station’s truss. “It stressed me out ...

The "ultra rapid" cold air hand dryers can have the same impact on the human ear as a road drill at close range, a study suggests. Researchers from Goldsmiths, University of London, said that the ...

The Hand Drill method of friction fire making is about as raw as it gets. You spin a wooden drill against a wood board with your bare hands. This method has had one of the widest distributions on ...