Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. Toxic dust on Mars ...
(CNN) -- A massive fire emitting toxic smoke from an eastern Indiana recycling plant a mayor said had been a known "fire hazard" has forced evacuation orders for about 2,000 people as it is expected ...
Smoke from massive Canadian wildfires has been blowing thousands of miles across the U.S., blotting out the sun and shrouding many cities in a cough-inducing haze. As the smoke drifts with the wind, ...
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