PCBs levels down in Norwegian polar bears

It's never been easy to be a polar bear. They may have to go months without eating. Their preferred food, seal, requires enormous luck and patience to catch. Add to that the melting of Arctic sea ice due to climate change, ...

The acid test: 21st century pH meter

Modern methods for mass production of biological agents and fine chemicals require precise control of pH. However within these systems it is not always possible to use traditional methods for measuring acidity and alkalinity. ...

Nobel scientist who warned of thinning ozone dies

(AP) -- F. Sherwood Rowland, the Nobel prize-winning chemist who sounded the alarm on the thinning of the Earth's ozone layer and crusaded against the use of man-made chemicals that were harming earth's atmospheric blanket, ...

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