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.
Anxiety and Restlessness. When thinking about the side effects of tea, consider the drink's caffeine content. According to MedlinePlus, a cup of tea can often have between 14 and 60 milligrams of caffeine, which is less than the caffeine found in coffee. However, it could provide a noticeable jolt of energy for some people.