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Marijuana Use is Rising; Ecstasy Use is Beginning to Rise; and Alcohol Use is Declining Among U.S. Teens

Culture, Health

ANN ARBOR, Mich.— Several important findings come out of this year’s Monitoring the Future study, the 36th annual, national survey of American teens in a series that launched in 1975.

• Marijuana use, which had been rising among teens for the past two years, continues to rise again this year—a sharp contrast to the considerable decline of the preceding decade.

• Ecstasy use—which fell out of favor in the early 2000s as concerns about its dangers grew—appears to be making a comeback this year, following a considerable recent decline in the belief that its use is dangerous.

• Alcohol use—and, specifically, occasions of heavy drinking—continues its long-term decline among teens into 2010, reaching historically low levels. (more…)

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Cassini Spots Potential Ice Volcano on Saturn Moon

Science

PASADENA, Calif. — NASA’s Cassini spacecraft has found possible ice volcanoes on Saturn’s moon Titan that are similar in shape to those on Earth that spew molten rock.

Topography and surface composition data have enabled scientists to make the best case yet in the outer solar system for an Earth-like volcano landform that erupts in ice. The results were presented on December 14 at the American Geophysical Union meeting in San Francisco. (more…)

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High-Tech Software and Unmanned Planes Allow Scientists to Keep Tabs on Arctic Seals

Environment, Nature

A novel project using cameras mounted on unmanned aircraft flying over the Arctic is serving double duty by assessing the characteristics of declining sea ice and using the same aerial photos to pinpoint seals that have hauled up on ice floes.

The project is the first to use aircraft to monitor ice and seals in remote areas without putting pilots and observers at risk, said Elizabeth Weatherhead of the University of Colorado at Boulder, who is leading the study team. Weatherhead is a senior scientist at the Cooperative Institute for Research in Environmental Sciences, a joint venture of CU-Boulder and the National Oceanic and Atmospheric Administration. (more…)

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IBM’s “Watson” Computing System to Challenge All Time Greatest Jeopardy! Champions

Technology

*Competition Scheduled for February 2011*

ARMONK, N.Y. & CULVER CITY, Calif. – 14 Dec 2010: IBM and America’s Favorite Quiz show® Jeopardy! today announced that an IBM computing system named “Watson” will compete on Jeopardy! against the show’s two most successful and celebrated contestants — Ken Jennings and Brad Rutter. 

The first-ever man vs. machine Jeopardy! competition will air on February 14, 15 and 16, 2011, with two matches being played over three consecutive days.  (more…)

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‘Music and Caroling an Important Part of Holiday Celebrations’

Culture

During the holidays, no matter how you celebrate or what your beliefs, music is almost always an important part of the celebration, according to Thomas Riis, a musicologist and director of the American Music Research Center in the University of Colorado at Boulder’s College of Music.

“Singing brings people together and is a natural and comfortable community activity,” Riis said. (more…)

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Crocodiles 168 Times More Dangerous Than Sharks

General, Nature

The fears connected with shark attacks are stronger in the world today than those related to much more dangerous predators – crocodiles. However, crocodiles pose a greater threat to humans than sharks do.

A crocodile snatched Hendrik Coetzee, a South African guide, 35, from his kayak while he led an American expedition into the heart of Congo last week. Two American tourists could only watch the scene in horror as the guide was killed and eaten by the predator. They paddled to safety unharmed. Coetzee’s body has not been recovered.

Stories about croc attacks are just as terrible as they are hopeless. Experts say that it is possible to stay to fight off a shark, but it is much more difficult or even impossible to rescue themselves from an attacking croc. (more…)

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Atomic Weights of Ten Chemical Elements About to Change

Science

For the first time in history, a change will be made to the atomic weights of some elements listed on the Table of Standard Atomic Weights of the chemical elements found in the inside covers of chemistry textbooks worldwide.

The International Union of Pure and Applied Chemistry’s (IUPAC) Commission on Isotopic Abundances and Atomic Weights is publishing a new table that will express atomic weights of ten elements as intervals, rather than as single standard values. The new table is the result of cooperative research supported by the U.S. Geological Survey, IUPAC, and other contributing Commission members and institutions. (more…)

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