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Deadly dangers of medical helicopters

Although they have saved thousands of lives, the medical choppers that rescue and transport patients have also claimed the lives of hundreds of crew members in the past 29 years.

August 21, 2009 — Katherine Harmon

Caster Semenya and the issue of gender ambiguity

The controversy over South African athlete Caster Semenya's gender has given the public a view into the complexities of gender. At first blush, the issue should be fairly straightforward: a person is either a male (with an X and a Y chromosome) or a female (with two X chromosomes)...

August 21, 2009 — Larry Greenemeier

Bat Killer: White-Nose Syndrome [Video]

Since it was first observed in New York in 2006, a bat-killing infection known as white-nose syndrome has spread across the eastern seaboard. More than a million bats of six different species have perished so far and infected caverns continue to be discovered...

August 21, 2009 — David Biello

Synthetic biology advance: Genome transferred between two bacteria via yeast

Microbes can be resistant to genetic engineering. There's simply not enough DNA in some of them to permit significant alteration. But by building a bacterial genome inside yeast—a more complex and information-rich eukaryote that is one of mankind's oldest genetic engineering projects—scientists have successfully created new, synthetic bacterial strains, according to a paper published today in Science...

August 20, 2009 — David Biello

Do people really walk in circles?

Yes, people really do walk in circles—but only when stripped of important visual clues, such as the sun or moon, according to a paper published online today in Current Biology .

August 20, 2009 — Katherine Harmon

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