Berlin's famous polar bear Knut, who rose to international stardom as a cuddly cub hand-raised by zookeepers, died suddenly on Saturday, a zoo official said. The world-famous bear died alone in his ...

Regarding the ex-polar lands, compound hot-dry extremes prevail due to active land–atmosphere interactions. Specifically, a mid-tropospheric ridge initiates descending motions, creating clear-sky ...

Chemists have made the all-cis isomer of 1,2,3,4,5,6-hexafluorocyclohexane, a crystalline ring molecule with all six fluorines pointing “up” and all six hydrogens pointing “down.” This compound is ...