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Friday, October 24, 2014

ScienceDaily: Most Popular News

ScienceDaily: Most Popular News

Thermal paper cash register receipts account for high bisphenol A (BPA) levels in humans

Posted: 22 Oct 2014 11:36 AM PDT

BPA from thermal paper used in cash register receipts accounts for high levels of BPA in humans. Subjects studied showed a rapid increase of BPA in their blood after using a skin care product and then touching a store receipt with BPA.

Cosmic rays threaten future deep-space astronaut missions

Posted: 21 Oct 2014 10:50 AM PDT

Crewed missions to Mars remain an essential goal for NASA, but scientists are only now beginning to understand and characterize the radiation hazards that could make such ventures risky, concludes a new article.

Ancient Europeans intolerant to lactose for 5,000 years after they adopted agriculture

Posted: 21 Oct 2014 09:59 AM PDT

By analyzing DNA from petrous bones of ancient Europeans, scientists have identified these peoples remained intolerant to lactose (natural sugar in the milk of mammals) for 5,000 years after they adopted agricultural practices. The scientific team examined nuclear ancient DNA extracted from thirteen individuals from burials from archaeological sites in the Great Hungarian Plain. The skeletons sampled date from 5,700 BC (Early Neolithic) to 800 BC (Iron Age).

Fight against Alzheimer's disease: New research on walnuts

Posted: 21 Oct 2014 09:57 AM PDT

An new animal study reveals potential brain-health benefits of a walnut-enriched diet. Researchers suggest that a diet including walnuts may have a beneficial effect in reducing the risk, delaying the onset, slowing the progression of, or preventing Alzheimer's disease.

Exposure to aluminum may impact on male fertility, research suggests

Posted: 21 Oct 2014 05:51 AM PDT

Human exposure to aluminum may be a significant factor in falling sperm counts and reduced male fertility, new research suggests. Fluorescence microscopy using an aluminum-specific stain confirmed the presence of aluminum in semen and showed aluminum inside individual sperm.

Heavy metal frost? A new look at a Venusian mystery

Posted: 20 Oct 2014 10:39 AM PDT

Venus is hiding something beneath its brilliant shroud of clouds: a first order mystery about the planet that researchers may be a little closer to solving because of a new re-analysis of twenty-year-old spacecraft data. Venus's surface can't be seen from orbit in visible light because of the planet's hot, dense, cloudy atmosphere. Instead, radar has been used by spacecraft to penetrate the clouds and map out the surface – both by reflecting radar off the surface to measure elevation and by looking at the radio emissions of the hot surface. The last spacecraft to map Venus in this way was Magellan, two decades ago.

Sexual preference for masculine men, feminine women is an urban habit

Posted: 20 Oct 2014 07:53 AM PDT

A groundbreaking new study suggests that, rather than being passed down through a long process of social and sexual selection, preferences for masculine men and feminine women is a relatively new habit that has only emerged in modern, urbanized societies.

Imaging electric charge propagating along microbial nanowires

Posted: 19 Oct 2014 12:18 PM PDT

Physicists report that they've used a new imaging technique, electrostatic force microscopy, to resolve the biological debate with evidence from physics, showing that electric charges do indeed propagate along microbial nanowires just as they do in carbon nanotubes, a highly conductive human-made material.

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