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January 15, 2019
In the mid-1980s, scientists uncovered a troubling phenomenon: The ozone layer, which protects all living things on Earth from the Sun’s ultraviolet radiation, was rapidly thinning over Antarctica.
December 13, 2018
Tensions escalated between the United States and Soviet Union in the wake of World War II as the two countries stockpiled nuclear weapons and detonated hundreds of test bombs in the atmosphere. But this arms race had an unexpected side effect: scientists learned for the first time how air behaves in Earth’s upper atmosphere and how pollution, volcanic ash, and radioactive fallout travel around the globe.