AMES, Iowa – Three thin leaflets blew open and blood blasted through an artificial heart valve, the center stream firing reds and yellows, the colors indicating a flow speed up to 125 centimeters per ...
Morning Overview on MSN
This radical wind turbine design could quietly change the entire world
Wind power has always been a trade off between clean energy and the visual, acoustic, and ecological cost of giant spinning ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results