EXPLAINER: How China got blue skies in time for Olympics

The blue skies greeting Olympic athletes here this month are a stark change from just a decade ago when the city's choking air pollution was dubbed an "Airpocalypse" and blamed for scaring off tourists.

Aircraft help fight California wildfire as smoke clears

Thick smoke that held down winds and temperatures in the zone of the largest single wildfire in California history cleared Monday from scenic forestlands, allowing firefighting aircraft to rejoin the battle to contain the ...

Gravity wave insights from internet-beaming balloons

Giant balloons launched into the stratosphere to beam internet service to Earth have helped scientists measure tiny ripples in our upper atmosphere, uncovering patterns that could improve weather forecasts and climate models.

Image: Comet NEOWISE seen in an aurora-filled sky

Comet NEOWISE is visible in an aurora-filled sky in this photo by Aurorasaurus Ambassador Donna Lach. The photo was taken early on July 14, 2020, in western Manitoba, Canada. The purple ribbon-like structure to the left is ...

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