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By Barbara Casassus of Nature magazine Variable energy sources such as wind and solar power could provide 19-63% of required electricity in many countries if the technical and market hurdles are overcome, according to the International Energy Agency (IEA). [More]

Arthur Stanley Eddington was an interesting fellow.

Guam is 17 hours ahead of Los Angeles, and even our USC students were up early (or at least on time) for our first morning in Micronesia. After a generous and very international buffet breakfast in the Hilton we walked out into intermittent squalls and boarded our charter bus to the Guam Department of Agriculture. There we were met by Dave Ginsburg’s long-time friend and colleague, Brent Tibbatts of the Division of Aquatic and Wildlife Resources.

With age and enough experience, we all become connoisseurs of a sort.

Women may have a more subtle way of telling men “no” than anyone imagined. Chemical cues in their tears signal that they are not interested in romantic ac

In the beginning, Web site owners posted words and pictures on their pages. Today we refer to that primitive time as Web 1.0.

You can substantially improve your chances of spending your money wisely if you consult your fellow customers first--by checking into a crowdsourced review site like TripAdvisor (vacation spots and hotels), Yelp (restaurants), IMDB or RottenTomatoes (movies), Edmunds (cars), Angie's List (contractors), Amazon (books) and so on.

Key concepts Cardiovascular system [More]

We take it for granted that our hair dryers won't send us to the emergency room and our toothbrushes won't make us go numb. Unfortunately, the same can't be said about sex toys.

Automakers are looking to integrate wireless medical monitoring technologies into their in-car networks so drivers can keep tabs on their health while on the go. Katherine Harmon reports. Getting stuck in traffic might be enough to raise anyone's blood pressure

Fantastically detailed, visually arresting photographs of Andromeda, a spiral galaxy that lies 2.5 million light-years from Earth, have been available for years.

Giant swirling masses of seawater known as mesoscale eddies roam the world's oceans. Whipped up by surface winds and girded by the Coriolis effect (produced by Earth's rotation), eddies may grow to several hundred kilometers in diameter and are known to transport heat, chemicals and biology throughout the oceans' shallower depths. A new study published April 29 in Science suggests that eddies may have a deeper reach than previously thought, helping to shape some of the most remote ecosystems on Earth--deep-sea hydrothermal vents.

The tornado that leveled much of Joplin, Mo., Sunday evening gave little warning. Although a watch had been in effect for a broader region for much of the day, some locals had as few as 20 minutes' notice that a tornado that would ultimately span as much as three-quarters of a mile was about to touch down on top of them

Spam comprises upwards of 80 percent of incoming e-mail , despite monumental efforts by help desks and security software companies to defeat it. The reason spam volumes continue to grow is that such efforts are often misplaced and fail to hit spammers where it hurts. Instead of trying to shut down the hydra-like tangle of Web servers that route spam to our inboxes, a much more focused attack should be made to disable payment for the goods (Viagra pills, Bosley hair loss treatment, Space Bag storage, etc.) that spam is used to advertise, according to a team of researchers presenting their findings Tuesday at IEEE Symposium on Security and Privacy in Oakland, Calif.

By Philip Ball of Nature magazine Chemists have succeeded in synthesizing a natural compound that shows promise as a painkiller--and might not cause the side effects that bedevil analgesics currently used to treat acute and chronic conditions. Conolidine is found in the bark of the tropical flowering shrub Tabernaemontana divaricata , commonly called the pinwheel flower. [More]