Smoke from wildfires blazing across Canada is once again wafting over huge portions of the Midwest and worsening air quality, ...

Scientific American is part of Springer Nature, which owns or has commercial relations with thousands of scientific ...

Emma R. Hasson is a Ph.D. candidate in mathematics at the City University of New York Graduate Center with expertise in math ...

In fact, only three factors can be used to define a black hole: its mass, its angular momentum and its electric charge. In reality, that charge will be neutral or very close to it, so in practical ...

Charles C. Mann is author of, most recently, The Wizard and the Prophet (Picador, 2018). His book 1491 won the National Academy of Sciences' Keck Award for best book of 2006.