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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

How much is a wolf worth in Idaho? $11.75

Gray wolves have a price tag on their heads in Idaho, and it's a bargain-basement price at that.

Starting Monday, Idaho residents can get wolf-hunting permits for just $11.75 (after purchasing a state hunting license for $12.75, of course)...

August 19, 2009 — John Platt

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