It’s been less than 10 months since hurricane Sandy sent surges of flooding saltwater into city streets and tunnels, and New York is still cleaning up – and mostly in the discussion phase about how to be better prepared.
Scientists have long tried to figure out what causes the ebb and flow of ice ages. New data suggests a novel explanation for why the mile-thick blankets of ice retreat so quickly: They become too heavy.
Solar Impulse embarked on the first transcontinental flight of its kind Friday. The Solar Impulse is a dramatic endorsement of clean-energy technology, but probably doesn't represent the future of aviation.