A Workout Can Change Your DNA

Reporting in Cell Metabolism, researchers write that when people who lead relatively sedentary lives worked out the DNA in their muscle fibers changed almost immediately. Scientists also found caffeine had the same effect on isolated rodent muscles. Study co-author Juleen Zierath discusses the DNA modifications.

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Can An Early Spring Confuse Nature’s Clock?

It’s been an unusually warm winter in some parts of the country, with springtime temperatures and very little snow. How is nature responding? Purdue entomologist Tom Turpin and horticulturalist Kristin Schleiter of the New York Botanical Garden discuss how an early spring affects flower buds, beetles and bees.

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How To Get More For Your Bite

When you crunch into a potato chip or take a spoonful of chocolate mousse what you experience is more than just the taste of the food. In her book Taste What You’re Missing, Barb Stuckey discusses why truly experiencing food involves all five senses and offers tips on how to get more enjoyment from your next meal.

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Gorilla Genome Sheds Light On Human Evolution

Reporting in Nature, researchers write they have deciphered the genetic code of the gorilla, the last of the great apes to have its genome sequenced. Study co-author Aylwyn Scally discusses what the data reveal about the evolution of humans and other apes.

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Trauma, Not Radiation, Is Key Concern In Japan

Experts say health effects from the radiation released by last year’s nuclear disaster will be minimal. But the lasting psychological trauma from the tsunami, including the loss of life and livelihoods, will be an ongoing struggle.

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Senate Blocks Effort To Speed Pipeline Approval

The 56-42 vote came after President Obama called Democratic senators to lobby them to oppose the 1,700-mile Keystone XL pipeline, which would carry tar sands oil from western Canada. Republicans wanted to sidestep Obama’s rejection of the pipeline and allow the project to go forward.

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Solar Storm Goes Easy On Earth — But More Are Sure To Come, NASA Says

The huge solar storm that NASA detected hurtling toward Earth hit our planet at 5:42 a.m. ET Thursday. So far, there have been no reports of major power or communications disruptions. But it’s not the last you’ll hear about solar storms; the sun’s activity won’t peak until 2013.

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