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Lessons in Space Exploration From Lewis and Clark
The similarities between the Lewis and Clark expedition of 1803 to 1806 and a manned mission to Mars are not immediately obvious
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Leap Second Added to Your Calendar
The official Keepers of Time will add a leap second to the world’s master clocks (in the U.S. Naval Observatory) on December 31 at 23:59:59 UTC
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Picture of the Week—Diatoms or Modern Art?
Michael Stringer of Westcliff-on-Sea, England won the 2008 Nikon Small world Photomicrography Competition earlier this year with the image below
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Picture of the Week – A Newly Restored Photo of the Earth and Moon
This week’s Picture of the Week is the Earth as seen from the Moon, circa 1966.Thinking ahead, NASA sent five missions up to photograph the moon
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Slow Monsoon Seasons Led to End of Chinese Dynasties
Like ice cores or tree rings, stalagmites (those are the ones that grow up from the cave floor) can record ancient history
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How mercury gets into tuna and other fish in the ocean has scientists searching from the coast to the floor
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Richard Fiske discusses his groundbreaking work
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A look at man-made and natural causes that are threatening the Earth
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Wild Things: Life as We Know It
Bumblebees, elephants and endless summer
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Weighing threats on land and from the sea
City patterns, farm history, ancient seabeds, old mountains and new, the why of clouds: take a look
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It took two millennia to get the one we now use; we owe a lot to the sun and moon, to Caesar, Pope Gregory and, oh yes, the Earl of Chesterfield
In one spot on the continental shelf, scientists aim to understand all that happens, 24 hours a day
It may seem primitive, but it can do some things you wouldn’t want to try at home
It’s colorless, odorless and gets no respect, but it’s vital to the cycle of life and we may be using too much
Mining the Scrap Heap for Treasure
Across America, a network of scrap-metal firms is supplying much of the raw materials, iron to aluminum, that fuel the growing global economy
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