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Many years ago, when I was still in high school, I was extremely fond of chewing gum, especially during class hours. However, sooner or later the chewing gum would either lose its taste or I would become bored with it.

By Alister Doyle, Environment Correspondent OSLO (Reuters) - Quickening climate change in the Arctic including a thaw of Greenland's ice could raise world sea levels by up to 1.6 meters by 2100, an international report showed on Tuesday. [More]

Dieters take note: thinking in detail about eating can reduce actual food consumption, according to a study in the December 10, 2010, issue of Science .

Editor-in-Chief Mariette DiChristina and her daughters show us how to make Oobleck, a substance that's not quite liquid and not quite solid. For more fun activities to do with your kids visit scientificamerican.com/BringScienceHome.

Through the month of May, Scientific American Editor-in-Chief Mariette DiChristina presents Bring Science Home - a series of fun science activities parents and kids ages 6-12 can do together using household items.

In the past year floods have submerged cities as far apart as Nashville, Tenn., and Nowshera, Pakistan.

Several devastating earthquakes have rumbled beneath the Pacific in the past 15 months. In Feb

Psi, or the paranormal, denotes anomalous psychological effects that are currently unexplained by normal causes.

Key concepts Gravity [More]

Will Al Qaeda respond to the death of Osama bin Lade n with serious cyber attacks? [More]

NEW YORK CITY--On Monday morning, hours after U.S. forces killed Osama bin Laden, subway platforms and cars here held more than their usual share of cops

By Gwyneth Dickey Zakaib of Nature magazine On land, the pattern is a sadly familiar one: when an ecosystem is threatened, it is the large predators that usually suffer the greatest decline and therefore are most in need of protection. [More]

When the U.S. military attacked Iraq in March 2003, it brought to bear the most advanced technology then available for identifying potential terrorists by their physical features. The equipment measured all sorts of physical features--from fingerprints to images of the retina--but it was not particularly easy to use.

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The story is called Appointment in Samarra . A Baghdad merchant sends a servant to buy provisions.