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Science Talk: May 14, 2008 (Scientific American)

Wed, 14 May 2008 15:30:08 GMT

China Quake Update; Fictional Scientists; What's New at Sciam.com

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Scientists Mark 25 Years of HIV Research (Science Friday)

Fri, 09 May 2008 22:05:46 GMT

In May 1983, the first scientific papers were published describing the possible connection between a retrovirus and the development of AIDS. The virus went on to become known as HIV. Experts discuss whether, 25 years later, scientists any closer to a cure for AIDS or to a vaccine to prevent HIV transmission.

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Study: Sahara Gradually Dried Up Over 6,000 Years (Science Friday)

Fri, 09 May 2008 22:05:40 GMT

What made the Sahara Desert go dry — and are there ancient waters still hidden below the sands? In a controversial study published in the journal Science researchers argue that the drying of the Sahara took place over thousands of years — not suddenly as was previously thought.

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Mysterious Memristor: Electronics' Missing Link? (Science Friday)

Fri, 09 May 2008 22:05:32 GMT

Introductory electronics classes focus on circuit diagrams involving combinations of resistors, capacitors and inductors. Now, researchers have discovered a fourth passive circuit element — one that fills in a gap in equations describing relationships between voltage, current and magnetic flux.

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Common Weedkiller May Cause Hormonal Problems (Science Friday)

Fri, 09 May 2008 22:05:27 GMT

Researchers report that atrazine, the second-most-applied weedkiller in the U.S., may be able to disrupt hormonal signaling in humans. The herbicide, which has been banned in Europe, is suspected of playing a role in sexual abnormalities in fish, frogs and other aquatic organisms.

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Is It Better to Eat Locally or Eat Differently? (Science Friday)

Fri, 09 May 2008 22:05:19 GMT

When it comes to greenhouse gas emissions, what you eat may be more important than where your food comes from. A new study finds that replacing red meat and dairy products with chicken, fish or vegetables could have the same impact as shifting to an entirely locally-grown diet.

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TV Viewers Prepare for Digital Transition (Science Friday)

Fri, 09 May 2008 22:05:11 GMT

In February 2009, all full-power broadcast television stations in the U.S. will stop analog transmissions and begin broadcasting only in digital. Viewers who have cable or satellite are fine, but those who have older TVs receiving over-the-air signals may need to buy converters.

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Science Talk: May 7, 2008 (Scientific American)

Wed, 07 May 2008 19:30:08 GMT

Evolution Enclaves: Darwin the Botanist and Origins of Life Research

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Life Expectancy Declines for Poor Women in U.S. (Science Friday)

Fri, 02 May 2008 22:04:55 GMT

Women living in America's poorest counties have seen their average life expectancy decline in recent years. New research shows that the gaps between the best-off and worst-off groups are widening — as much as 18 years between the two — in connection with smoking, high blood pressure and obesity.

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Advances in Gene Therapy Treatment for Blindness (Science Friday)

Fri, 02 May 2008 22:04:40 GMT

Researchers using a gene therapy technique to treat one form of congenital blindness have reported some success. Two teams of scientists have used modified viruses injected into the eye to partially restore vision to people who have Leber congenital amaurosis, an illness that results in the degradation of the retina.

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U.S. Carbon Footprint Difficult to Reduce (Science Friday)

Fri, 02 May 2008 22:04:35 GMT

According to a new survey, even the people in the U.S. with the lowest energy usage have a carbon footprint about twice as high as the average global citizen. What changes can an American make to have a significant effect on emissions?

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Peering into the Human Brain with fMRI Techniques (Science Friday)

Fri, 02 May 2008 22:04:17 GMT

What's really going on inside your head when you make a decision, make a mistake, or have a few drinks? Researchers are using fMRI techniques to monitor blood flow through the brain and are hoping to shed light on the mysterious inner workings of the human mind.

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Salt Water Irrigation Yields Tasty Tomatoes (Science Friday)

Fri, 02 May 2008 22:04:11 GMT

Researchers report that growing cherry tomatoes in diluted seawater can make them tastier and richer in antioxidants. The findings could encourage the use of slightly brackish water in tomato agriculture, extending precious supplies of fresh water.

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Asking Big Questions (Nova Science Now)

Fri, 02 May 2008 20:00:00 GMT

Dr. Judah Folkman, a pioneer in the field of cancer research, passed away in January 2008. In this podcast, he describes how a high school chemistry teacher inspired him to think big, and make unlikely connections. Podcast produced by David Levin. Music by The New You. Judah Folkman audio courtesy Oberlin College. NOVA is produced by WGBH in Boston. Major funding for NOVA is provided by the Corporation...

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Science Talk: April 30, 2008 (Scientific American)

Wed, 30 Apr 2008 15:32:00 GMT

Plasma Physics: From Black Holes to Radio Reception

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Building a More Sociable Robot (Science Friday)

Fri, 25 Apr 2008 22:08:51 GMT

Can't find anyone who wants to hang out this weekend? Help may be on the way. Inventors are working to develop robots that can interact with people on a deeper level: communicating, responding to emotion and operating under specific rules of social behavior.

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T. Rex Protein Evidence Links Dinosaurs to Birds (Science Friday)

Fri, 25 Apr 2008 22:08:43 GMT

Analysis of proteins found in a scrap of collagen from a 68-million-year-old Tyrannosaurus rex leg bone provides strong evidence for the idea that dinosaurs are the ancestors of modern-day birds. Paleontologist Mary Higby Schweitzer talks about the finding and what it means for our understanding of evolution.

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PETA Offers Incentive for Test-Tube Meat Research (Science Friday)

Fri, 25 Apr 2008 22:08:35 GMT

Animal rights group PETA is offering a $1 million prize for the development of commercially-viable "test-tube meat" — real meat grown through a lab process, not from a live animal. To win, the lab-grown meat must have a taste and texture indistinguishable from real chicken flesh.

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Pine Forests Destroyed by Beetle Takeover (Science Friday)

Fri, 25 Apr 2008 22:08:29 GMT

Canadian forests are being hit hard by an outbreak of the mountain pine beetle. Though the beetles are small — less than 1/3 of an inch long — they're hungry, and bore through the wood of a variety of pine tree species. Ecologists are worried that the death of so many trees will have a significant impact on the carbon balance in North America.

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Science Talk: April 23, 2008 (Scientific American)

Wed, 23 Apr 2008 15:25:08 GMT

Can Science Save the Banana?

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