Cold Suns, Warm Exoplanets and Methane Blankets
Early Earth probably would have frozen solid, if not for greenhouse gasses, and a new model shows how they could have feasibly arisen.
Brake Dust May Cause More Problems Than Blackened Wheel Covers
Though tailpipe emissions could fall in the years ahead as more zero-emission vehicles hit the streets, one major source of highway air pollution shows no signs of abating: brake and tire dust.
