The ozone hole and acid rain were once considered the big-gest environmental concerns. Today, however, they don't hold prominence in the list of potential environmental disasters. Could it be because there never was much to fear in the first place? Foreign Policy finds out... Acid Rain | Acid rain refers to precipitation of any kind with high concentrations of nitric and sulfuric acids. High acidity levels in rain can...>> Read Story

Ruy Pinto is Director of Satellite Control and Navigation for Inmarsat; with responsibility for the on-station control of the fleet of Inmarsat satellites and the development of...>> More Story

One phenomenon - it can't really be called a problem - is the fact that in zero gravity, as the fluids in your body are no longer pulled down towards...More Story >>

Nuclear radiation, including both high-energy particles such as protons and other atomic nuclei, and high-frequency electro-magnetic waves, X-rays and...More Story >>

Gas giants may have a rocky or metallic core—in fact, such a core is thought to be required for a gas giant to form—but the majority of its mass is in the form of the gases hydrogen and helium, with traces of water, methane, ammonia, and other hydrogen compounds.Unlike rocky planets, which have a clearly defined difference between atmosphere and surface, gas giants do not...>> More Story