Wildfire smoke from Canada has hit Norway, which is more than 3,000 miles from the North American country.
New York City's normally good air quality rating recently plummeted to the worst of any major city in the world, as wildfire smoke drifted over the city from Canada.
The characteristic zigzag pattern of lightning is caused by a highly conductive form of oxygen that builds up as the bolt travels toward the ground.
A type of crystal that breaks the rules of ordinary crystallography has been found in a tube of melted sand from Nebraska.
During thunderstorms, leaves from trees and other plants create mini electric discharges that can significantly alter the surrounding air quality. But researchers are unsure if this is beneficial or harmful.
Tens of thousands of people in Japan have already sought shelter from powerful storm Nanmadol, which could be the most destructive in decades.
Coastal Alaska is recovering after a weekend of brutal flooding caused by the remnants of Typhoon Merbok.
Fires such as those caused by a recent record-breaking heatwave in Europe will likely become more common as the climate warms, scientists say.
A fiery new photograph of the Flame Nebula depicts the emissions from brand-new stars, burning through space like cosmic wildfires.
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