November 27, 2012

Deep in Earth's Core, Clues About Mysterious Birth

Emily Elert, Popular Science

AP Photo

We've known for over half a century that the Earth is 4.5 billion years old, but for people like University of California, Davis geologist Qing-zhu Yin, that number just isn't good enough--they need to determine what digit comes after the '5'. Yin has spent the last fifteen years trying to figure out exactly how our solar system formed--how, over a span of some tens of millions of years, a large chaotic disc of dust and gas turned itself into eight planets in orderly orbit around a central star.

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TAGGED: Earth's Core, Earth


October 21, 2013
How Science Figured Out Earth's Age
Paul Braterman, Scientific American
Aristotle thought the earth had existed eternally. Roman poet Lucretius, intellectual heir to the Greek atomists, believed its formation must have been relatively recent, given that there were no records going back beyond the... more ››
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X-Rays Force Rethink on Earth's Core
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October 14, 2013
New Ideas on How Earth's Core Formed
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