Elizabeth Svoboda for National Geographic News February 2, 2006
Astronomers have tracked comets since before Galileo's time. But their exact composition has long remained a mystery. The thick, dusty clouds that trail comets make them difficult to observe with ground-based telescopes
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The era of the telegram, an icon of communication dating back 150 years, came to a quiet end last week. Western Union says it delivered its final telegram on Friday
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Brian Handwerk for National Geographic News January 25, 2006
After languishing for decades in the bowels of a New York museum, a dinosaur- era crocodile relative is seeing the light-and shedding secrets
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