This NASA/ESA Hubble Space Telescope image features a spiral galaxy, named UGC 10043. We don’t see the galaxy’s spiral arms because we are seeing it from the side. Located roughly 150 million ...

State Key Laboratory of Severe Weather & Key Laboratory for Atmospheric Chemistry, Institute of Atmospheric Composition, Chinese Academy of Meteorological Sciences, Beijing 100081, China ...

Some words may be mispronounced. Iowa needs to cut the amount of nitrate in five rivers — including the Cedar River — because of the threat it poses to drinking water, according to the U.S ...

But how can governments determine the “ideal” tax rate? Enter the Laffer curve—a theory that suggests there is an optimal tax rate that maximizes both government revenue and economic prosperity.