Natural arsenic salts are present in all waters, with natural concentrations of less than 10 parts per billion (ppb). Unfortunately, there is an increasing number of countries where toxic arsenic compounds in groundwater, which is used for drinking and irrigation, have been detected at concentrations above the World Health Organization's…

Science is among the most grandiose, the most magnificent playgrounds one can imagine. One can play with innumerable objects, turn them into composite objects, play with rules, combine rules in different ways, invent new rules, and build theoretical frameworks that reveal the essential simplicity and beauty of how different phenomena fit into a…

The problems and prospects of using science and technology to help solve world problems are briefly reviewed in this paper. Public attitudes toward these two areas have currently been changing due to recent scientific and technological developments that have been threatening or have had obvious deleterious consequences. Despite these criticisms,…