News
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EarthVolcanic ash gets its close-up
Last year’s eruption in Iceland spit out supersharp and potentially harmful particles, nanoscale images show.
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PhysicsSalt clouds relieve some Arctic warming
Sea sprays from increasingly open waters exert a cooling effect in the region.
By Janet Raloff -
PsychologyWhy some gorillas go unseen
Attention differences help to explain why some people don't notice surprising sights.
By Bruce Bower -
SpaceDry ice, wetter Mars
A previously unknown reservoir of frozen carbon dioxide could periodically vaporize, thickening the atmosphere and allowing liquid water to flow on the Red Planet’s surface.
By Ron Cowen -
EarthOzone loss made tropics rainier
Hole over Antarctica changes weather patterns all the way to the equator, simulations suggest.