Quantum mechanics/Casimir effect in one dimension. Abstract The Casimir effect is interesting because it introduces the concept of Ramanujan summation of the divergent series, 1+2+3+4+..., and because it offers experimental evidence that empty space is not truly empty. Every step in this derivation of the Casimir effect uses straight-forward and familiar mathematics.
Man's Kidney Failure Linked To Massive Tea Consumption. The puzzling case of a 56-year-old U.S. man who suddenly developed weakness, fatigue and body aches is leading doctors to warn that massive consumption of tea may be responsible.
Green tea is packed with healthy antioxidants and may help reduce heart-disease risk, manage blood sugar and boost weight-loss, according to the University of Maryland Medical Center. Despite the potential health rewards, however, drinking too much green tea can cause unpleasant -- or even dangerous -- side effects. For your health, limit green tea intake to five or fewer cups per day.