Technology & Space
Galileo, Reconsidered
The first biography of Galileo Galilei resurfaces and offers a new theory as to why the astronomer was put on trial
Diamonds on Demand
Lab-grown gemstones are now practically indistinguishable from mined diamonds. Scientists and engineers see a world of possibilities; jewelers are less enthusiastic
Space Race II
Scientists worry that a contest to send robotic rovers to the moon will threaten lunar landmarks
Most Popular
Strange Plants
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Earthly WondersA slideshow of the world's strangest plants |
National Parks
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Off the Beaten PathExperience the rich diversity of America's national parks |
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In The Magazine
National Parks
Niger's Wild Giraffes
Explore more images of wild giraffes in Niger
