Silhouetted against Earth's atmosphere, the Space Shuttle Endeavour cuts a striking figure in this 2010 photo taken from the International Space Station. The shuttle approaches the station against a backdrop of the layers of the atmosphere. The blue layer directly behind the shuttle is the mesosphere, and the white layer is the stratosphere. Below that is Earth's troposphere, the lowest portion of the atmosphere, seen in orange.
(Image credit: Expedition 22 Crew, NASA)
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Missing Electrons in the Atmosphere Possibly FoundThe mysterious disappearance of electrons in the atmosphere could be caused by meteors burning up in the sky, new research suggests.
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'Magnetic' Discovery May Reveal Why Earth Supports Life and Mars Doesn'tEarth's magnetic field, which protects the planet from harmful blasts of solar radiation, is much older than scientists had previously thought, researchers say.
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Whiffs of Antarctic Sulfur Hold Climate CluesHuge wildfires sparked by a powerful El Niño event 16 years ago left a distinct tinge of sulfur in Antarctica's snow.
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Secret Weapon? Conspiracy Theories Abound as US Military Closes HAARP -
Origin of Mysterious Jellyfish Lightning 'Sprites' RevealedThe origin of the mysterious reddish lighting above thunderstorms, known as atmospheric sprites, has long puzzled scientists, but they now have some idea how it forms.
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Missing Xenon Gas Found in Earth's Core -
Giant Impact That Formed the Moon Blew Off Earth's Atmosphere -
New Alien Life Claim Far from Convincing, Scientists Say -
Rockets' Red Glare! NASA Marks Fourth of July with Double Launch
