NASA is supposed to begin nonstop screening by 2020 for all asteroids that could pose a threat to Earth. Some astronomers now think the only way to affordably meet that deadline is by using mini-satellites
A massive galaxy’s gravity is so strong that it bends light, creating a “lens” in space. This natural magnifying glass is giving astronomers a rare view of a supernova on the other side of the universe.
A single shaft of spewing hot rock created an enormously long chain of mostly undersea mountains in the western Pacific. That chain takes an unexpected eastern curve. The reason, scientists now think, may be a gobbled-up tectonic plate.
Unsightly plastic bottles, bags and other trash give just a hint of the largely unseen problem of plastic pollution. Scientists have found tiny bits of it throughout the ocean. The bad news: Sea life can’t tell the difference between plastic and food.
Fracking operations have been polluting the environment. Some wastes have hormonal effects. Studies in mice now show that prenatal exposures to these wastes can trigger subtle but disturbing organ impacts.
Roads and buildings that have mushroomed up around Los Angeles in the past half-century. Now, a study finds they may have created conditions that limit fog. And that could further dry out this very arid part of America’s West Coast.
Government scientists link directly, for the first time, a boost in warming at Earth’s surface to increasing levels of carbon dioxide. Much of that gas has been released by human activities, such as coal burning and gas-burning vehicles.