Δευτέρα, 31 Μαρτίου 2014

ScienceDaily: Top Science News

ScienceDaily: Top Science News


Northern and southern hemisphere climates follow the beat of different drummers

Posted: 30 Mar 2014 12:13 PM PDT

Over the last 1000 years, temperature differences between the Northern and Southern Hemispheres were larger than previously thought. Using new data from the Southern Hemisphere, researchers have shown that climate model simulations overestimate the links between the climate variations across the Earth with implications for regional predictions.

Carbohydrate digestion and obesity strongly linked

Posted: 30 Mar 2014 12:13 PM PDT

New research indicates that obesity in the general population may be genetically linked to how our bodies digest carbohydrates. People usually have two copies of the gene AMY1, but in some regions of our DNA there can be variability in the number of copies a person carries, which is known as copy number variation. The number of copies of AMY1 can be highly variable between people, and it is believed that higher numbers of copies of the salivary amylase gene have evolved in response to a shift towards diets containing more starch since prehistoric times.

Earth's dynamic interior: Multiple compositional components of Earth's deep mantle carried up to surface

Posted: 30 Mar 2014 12:12 PM PDT

Seeking to better understand the composition of the lowermost part of Earth's mantle, located nearly 2,900 kilometers (1,800 miles) below the surface, researchers have developed new simulations that depict the dynamics of deep Earth. These could be used to explain the complex geochemistry of lava from hotspots such as Hawaii.

First sightings of solar flare phenomena confirm 3D models of space weather

Posted: 27 Mar 2014 07:13 AM PDT

Scientists have for the first time witnessed the mechanism behind explosive energy releases in the Sun's atmosphere, confirming new theories about how solar flares are created. New footage put together by an international team of researchers shows how entangled magnetic field lines looping from the Sun's surface slip around each other and lead to an eruption 35 times the size of the Earth and an explosive release of magnetic energy into space.

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