Dirty snow usually melts faster than fresh snow because it absorbs more energy from the Sun, and that’s not just a problem in sooty, gritty cities. Except for some mountains and high plateaus, snow ...

A few decades ago, the idea of predicting a disease outbreak via satellite was science fiction. But today, researchers can use environmental data to predict when and where some diseases are likely to ...

Pine Island Glacier is one of the fastest-retreating glaciers in Antarctica. This timeline highlights the most notable calving events of the past two decades.

NASA scientist Robert Benson was one of “eighteen crazy men and a dog” who set up the first permanent science base at the South Pole.

Vote for your favorite all-time Earth Observatory image. Help narrow the field from 32 nominees down to one champion in a five-round tournament.

Swirling white clouds, deep blue oceans, and multicolored landscapes come to life on the pages of NASA’s new photo essay Earth, a collection of dramatic images captured by satellites. Video transcript ...

It took someone with an entirely different perspective to tame the lion; it took a Dutch engineer who was more interested in practical applications than the exacting precision of science. Engineer and ...

Containing fossilized microscopic plants and animals and bits of dust swept from the continents, the layers of sludge on the ocean floor provide information for scientists trying to piece together the ...

Carbon flows between the atmosphere, land, and ocean in a cycle that encompasses nearly all life and sets the thermostat for Earth's climate. By burning fossil fuels, people are changing the carbon ...

Polar sea ice grows and shrinks dramatically each year, driven by seasonal cycles. Habitat for wildlife and harbinger of changing climate, sea ice offers scientists important clues about the state of ...

Attempts of Renaissance astronomers to explain the puzzling path of planets across the night sky led to modern science’s understanding of gravity and motion.

Each summer, monsoon rains sweep across southwestern Asia, soaking India and Bangladesh. In nearby Pakistan, the rains are usually less intense, more intermittent, and centered in the northeast. The ...