Ex Contributor

Scientists successfully use krypton to accurately date ancient Antarctic ice

Impact glass stores biodata for millions of years

Old tires become material for new and improved roads

Controlling the weather with a dressed laser

Doubts surface over climate benefit of biofuels from corn residue

Internet use can help ward off depression among elderly

Surprising material could play role in saving energy

Clean air? Fewer sources for self-cleaning

Food shortages could be most critical world issue by mid-century

Understanding how memories stick together