Zinc oxide that absorb harmful UV rays can damage human DNA when it is turned into nano-sized particles.
A team at the University of Wisconsin-Madison in the US has made crystals of zinc oxide that, when immersed in water, absorb vibrations and develop areas of strong negative and positive charge, leading to clean hydrogen fuel.
Major earthquake rattles Nepal, India
Day in Pics: 26th April
Showbiz World - April 26, 2015