Browsing All Posts published on »July, 2010«

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July 27, 2010 by

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Observatory – In Fruit Flies, Gender Is Determined at the Cellular Level – NYTimes.com

July 27, 2010 by

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Dr. Baker and his colleagues have made a surprising discovery: not every cell in the fly is marked as male or female. In a sense, some cells know their sex while others do not. Until now it was believed that every cell in a fruit fly had the appropriate male or female version of doublesex […]

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July 26, 2010 by

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Adventures in Very Recent Evolution – NYTimes.com

July 26, 2010 by

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Scientists from the Beijing Genomics Institute last month discovered another striking instance of human genetic change. Among Tibetans, they found, a set of genes evolved to cope with low oxygen levels as recently as 3,000 years ago. This, if confirmed, would be the most recent known instance of human evolution. via Adventures in Very Recent […]

Observatory – Explaining the Macaroni Penguin’s Egg Laying Strategy – NYTimes.com

July 26, 2010 by

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The puzzle of the abandoned egg has occupied biologists for six decades. Now, a new study, which will appear in the American Naturalist, offers a partial solution. The first egg’s smaller size may be because of a drop in protein levels as the penguin returns to land (South Georgia, in the case of the penguins […]

Star May Be Heaviest Ever Discovered – NYTimes.com

July 26, 2010 by

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A huge ball of brightly burning gas drifting through a neighboring galaxy may be the heaviest star ever discovered — hundreds of times more massive than the sun, scientists said Wednesday after working out its weight for the first time. Those behind the find say the star, called R136a1, may once have weighed as much […]

Climate Change – Sea Ice – Arctic – NYTimes.com

July 26, 2010 by

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“The Arctic ice cap shrank so much this summer that waves briefly lapped along two long-imagined Arctic shipping routes, the Northwest Passage over Canada and the Northern Sea Route over Russia.” via Climate Change – Sea Ice – Arctic – NYTimes.com.