The Largest Impact Crater in South America

Last month, a baseball-sized meteorite punched through the roof of a doctor's office in Lorton, Virginia, scattering insulation and ripping a hole in the carpet. What if it had been larger - much larger - and what if we knew in advance that it was coming?

This month, The Planetary Society calls attention to the dangers our planet faces from near-Earth objects (NEOs) through announcement of the discovery of South America's largest known impact crater by a researcher funded by a Planetary Society grant, participation in a meeting in Vienna of the United Nations Action Team-14, and publication of a special issue of The Planetary Report on planetary defense.…