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categorical decisions. Jurors look at testimony and judge whether a defendant is guilty or not guilty. Police officers take aim at suspects and have to determine whether they see a gun in the suspect’s hand, or something that just resembles a gun.

By David Cyranoski of Nature magazine There's a showdown brewing in the state of Texas -- and it could get ugly. [More]

By David Cyranoski of Nature magazine There's a showdown brewing in the state of Texas -- and it could get ugly.

By Lucas Laursen of Nature magazine Glaciologists and climatologists are racing to correct an error in the latest edition of The Times Comprehensive Atlas of the World, which they say overstates the extent of ice loss in Greenland over the past 12 years. The 13th edition of the atlas was released on 15 September.

By Lucas Laursen of Nature magazine Glaciologists and climatologists are racing to correct an error in the latest edition of The Times Comprehensive Atlas of the World, which they say overstates the extent of ice loss in Greenland over the past 12 years. The 13th edition of the atlas was released on 15 September. [More]

By Nina Chestney LONDON (Reuters) - Solutions such as fog catchers, seawater greenhouses and fuel cells powered by microscopic bacteria are on show to help secure water supply and food production as rising population and climate change put the world's natural resources under strain. [More]

Although astronomers only slowly came to realize dark matter’s importance in the universe, for me personally it happened in an instant. In my first project as a postdoc at the University of California, Berkeley, in 1978, I measured the rotational velocities of star-forming giant molecular clouds in the outer part of the disk of our Milky Way galaxy.

This video shows the spiral shape of our galaxy and two of its small satellite galaxies, the Large and Small Magellanic Clouds (to the left). The satellites orbit the main galaxy and, in the process, trigger slow-motion waves in it. On a human time scale, those waves look like a static warp in the galactic outskirts

Around the time you read this, the popular Introduction to Arti

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TOKYO (Reuters) - More than 1.3 million people were advised to evacuate on Tuesday as typhoon Roke approached Japan, threatening the industrial city of Nagoya with heavy rain and landslides.

(Updates casualties) By Biswajyoti Das [More]

[Audio clip of pain.] Physicians gauging pain have little to go on besides a patient’s self-report.

[Audio clip of pain.] Physicians gauging pain have little to go on besides a patient’s self-report.

Jupiter, Saturn, Uranus and Neptune. Those are the gas giants, the four heavyweights of the solar system. But was there once a fifth