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 ...

The most valuable fossils found in sediment cores are from tiny animals with a calcium carbonate shell, called foraminifera. One species of foraminifera lives in the icy waters of the Arctic above ...

Have you ever wondered what it would be like to live in a different part of the world? What would the weather be like? What kinds of animals would you see? Which plants live there? By investigating ...

× This page contains archived content and is no longer being updated. At the time of publication, it represented the best available science. Before widespread human settlement began to encroach on the ...

Image Mapping the Tiny Plankton That Feed Giant Right Whales Researchers used NASA satellite data to detect swarms of red-tinged copepods, a key food source for the endangered marine mammals, in the ...

Image Sizzling Start to Summer The eastern United States sweltered under high heat and humidity in late June 2025, breaking temperature records across the Midwest and Northeast. Published Jun 25, 2025 ...

Directions Examine the set of graphs below for a given city. Read carefully the temperature and precipitation scales on the graphs. Review the biome information. Two biome choices are given for each ...

References Adams, F.D. (1954). The Birth and Development of the Geological Sciences. New York: Dover Publications, Inc. ISBN: 0-486-20005-1. Morrell, J. (2005). John Phillips and the Business of ...

Image Cloudy With a Chance of Eclipse NASA citizen scientists collected thousands of photographs and temperature readings that are being used to study the relationship between total solar eclipses and ...

Land surface temperature is how hot the “surface” of the Earth would feel to the touch in a particular location. From a satellite’s point of view, the “surface” is whatever it sees when it looks ...

William Smith discovered that he could identify rock layers by the unique fossils they held. His discovery helped later generations of scientists to understand the history of life on Earth.

Description The coniferous forest is sandwiched in between the tundra to the north and the deciduous forest to the south. One type of coniferous forest, the northern boreal forest, is found in 50° to ...