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Refraction is the reason the sky is blue or red at sunrise and sunset. Refraction is explained.
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The quality of synthetic diamonds has improved so much they are hard to tell from real diamonds.
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Deciding which mountain is the tallest is not as straightforward as it appears.
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The hottest temperature ever recorded at a meteorological stations is not the hottest temperature Earth's surface has known.
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If there was intelligent life somewhere near us in our galaxy, we might expect to be able to sense it. Learn why scientists think that so far the Milky Way is silent.
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When North and South America joined at Panama, animals that had been separated for millions of years were in contact. North American mammals, which gave live birth, outcompeted the South American mars ...
Human population has increased dramatically, but there are many ways to measure biological success.
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Plasma is the 4th state of matter. This ionized gas makes up stars and is used for products on earth such as neon lights and plasma TVs.
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What would happen to gravity and Coriolis Effect if you tried to dig a hole through the center of the Earth.
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Evidence that Barringer Crater was formed by a meteorite impact includes high pressure minerals, overturned sedimentary rock layers, rock debris and fragments of the meteorite.
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