26 Apr '13, 2am

Earth's core is much hotter than thought

Earth's core is much hotter than thought

WASHINGTON: European scientists said Thursday that a new laboratory experiment shows the Earth's core is likely much hotter than last reported 20 years ago. It's not that the iron core of our planet has warmed, but rather that the technique used to estimate its heat previously was flawed, researchers said in the journal Science. Newer techniques have allowed experts at the European Synchrotron Radiation Facility to determine the temperature near Earth's center to be 6,000 degrees Celsius. That is about 1,000 degrees Celsius hotter than an experiment conducted by German researchers in 1993. Researchers are analysing the solid iron core of the Earth, where extreme temperatures and pressure result in a hard centre, while the surrounding iron at lower temperatures of about 4,000 degrees Celsius remains liquid. "We have developed a new technique where an intense beam of X-rays ...

Full article: http://www.channelnewsasia.com/news/lifestyle/earth-s-cor...

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