Oxygen: A colorless, tasteless, odorless gaseous element; the second-most abundant gas in the atmosphere, comprising 20.9 percent of dry air by volume. It is necessary for almost all forms of animal ...

Helium: A colorless, inert gaseous element that is a trace constituent of the atmosphere, amounting to only 0.000524 percent by volume of dry air. Its existence on the sun was recognized before its ...

With oil prices hovering at record highs Tuesday, a group of automobile manufacturers, energy producers, academics and government regulators gathered at UC Berkeley to ponder one possible alternative ...

Forbes contributors publish independent expert analyses and insights. I cover chemistry, from its small molecules to its big questions. Amid political and economic turmoil, Qatar has closed its two ...