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Science News for March 30, 2014


Study compares heart valve systems

A recent study published in JAMA compared two types of heart valve technologies used in transcatheter aortic valve replacement (TAVR) procedures. The researchers found that balloon-expandable valves had a higher rate of device success, with lower rates of complications such as regurgitation and the need for additional surgeries.

SourceJAMA Network·JournalJAMA·DateMar 30, 2014

Earth's dynamic interior

Researchers have developed new simulations that depict the dynamics of deep Earth, revealing a complex composition of the lowermost part of the mantle. The study suggests that mantle plumes can carry a combination of different materials from several reservoirs, explaining observations of hotspot lavas' chemical complexity.

SourceArizona State University·JournalNature Geoscience·DateMar 30, 2014

The Atlantic Ocean dances with the sun and volcanoes

Researchers at Aarhus University found a correlation between Atlantic Ocean temperature fluctuations and external forces like the Sun's energy cycle and volcanic eruptions since the Little Ice Age. This challenges previous theories of internal variability in ocean circulation, suggesting a complex interaction between mechanisms.

SourceAarhus University·JournalNature Communications·DateMar 30, 2014