NASA-NOAA satellite studies tropical storm Kiko's center

Hurricane Kiko weakened to a tropical storm, but imagery from NASA-NOAA's Suomi NPP satellite showed that the storm has maintained strength in the circular area of powerful storms around the low-level center.

Cutting emissions gradually will avert sudden jump in warming

Reducing fossil fuel emissions steadily over coming years will prevent millions of premature deaths and help avoid the worst of climate change without causing the large spike in short-term warming that some studies have predicted, ...

Dust from a giant asteroid crash caused an ancient ice age

About 466 million years ago, long before the age of the dinosaurs, the Earth froze. The seas began to ice over at the Earth's poles, and the new range of temperatures around the planet set the stage for a boom of new species ...

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