Uncharted Meteors
In 1967, NASA's Mariner 4 spacecraft was cruising through the solar system, not far from Earth, when something unexpected happened. 'Mariner 4 ran into a cloud of space dust,' says Bill Cooke of the Marshall Space Flight Center Space Environments Team. 'For…
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More science facts
Biology
What Elements Are Required By Animals And Plants For Survival?
An understanding of our fragile environment can begin with a recognition of the importance of certain…
Geology
What Causes The Blue Color That Sometimes Appears In Snow And Ice?
Generally, snow and ice present us with a uniformly white face. This is because most all of the visible light…
Medicine
Hypotension
Bend to select a book from the lowest shelf, then rise quickly. Chances are, you'll feel a little lightheaded…
Astronomy
What Powered the Big Bang?
During the last decade, sky maps of the radiation relic of the Big Bang---first by NASA's Cosmic Background…