2011 International Year of Chemistry = Global Outreach
So the other day I was walking up the creek in my backyard with my son and he asked me, "Dad how do we know if the creek water is clean?"
So the other day I was walking up the creek in my backyard with my son and he asked me, "Dad how do we know if the creek water is clean?"
The thickness of a single sheet of paper is about 100,000 nanometers. So is the width of a human hair....