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Stories by Katherine Harmon

Crocodile relative might have chewed like a mammal

Modern crocodiles might have sharp, flesh-tearing teeth, but they cannot chew like us humans. In fact, mammals have cornered the market on mastication, leaving other life-forms to simply shred their food before ingesting it...

August 4, 2010 — Katherine Harmon

Confused circadian rhythm could increase triglycerides

Having a mixed up body clock has been linked to a vast array of ailments, including obesity and bipolar disorder. And researchers are still trying to understand just how these cyclical signals influence aspects of our cellular and organ system activity...

August 3, 2010 — Katherine Harmon

Social Ties Boost Survival by 50 Percent

A meta-study covering more than 300,000 participants across all ages reveals that adults get a 50 percent boost in longevity if they have a solid social network

July 28, 2010 — Katherine Harmon

When should a scientist's data be liberated for all to see?

When researchers make an exciting discovery, the data behind it are often closely guarded until they can be examined, developed and then revealed—at least in part—in a peer-reviewed journal with all of the proverbial fanfare...

July 22, 2010 — Katherine Harmon

The warm, fuzzy side of climate change: Heftier marmots

While polar bears flounder in the face of shrinking ice floes, another furry creature has gotten a boost from climate change. In the past three decades yellow-bellied marmots ( Marmota flaviventris ) have been fruitful—and multiplied—thanks to longer summers, according to a new study...

July 21, 2010 — Katherine Harmon

Adult stem cells retain cellular memory of original tissue

Curious differences in gene expression between reprogrammed adult stem cells, called induced pluripotent stem cells (iPS cells), and the embryonic stem cells that the former are designed to mimic might now be explained by a new discovery about just how much information a "reprogrammed" adult stem cell retains...

July 19, 2010 — Katherine Harmon

Vaginal gel shows effectiveness in preventing HIV in women

A vaginal microbicide can cut HIV infection rates by 39 percent in women, researchers announced Monday. And female study participants who inserted the gel as directed reduced their chances of contracting HIV by more than half (54 percent)...

July 19, 2010 — Katherine Harmon
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