Weather can be as unpredictable as it is fascinating. From the gentle patter of rain to the ferocity of thunderstorms, the ...

About 3,100 mi 3 (12,900 km 3) of water, mostly in the form of water vapor, is in the atmosphere at any one time. If it all fell as precipitation at once, the Earth would be covered with only ...

These results suggest that similar reactions between helium and iron may have occurred within Earth’s core shortly after its formation, trapping much of the primordial helium-3 in the material that ...

Exoplanets come in extreme forms—lava spheres, diamond cores, and even planets that rain molten iron—but some are eerily Earth-like and sit in their star’s habitable zone. Traditionally, a ...