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Last updated on April 19, 2014 at 1:20 EDT

Latest Nicolas Dauphas Stories

Evidence Found That Exploding Star Gave Birth To Solar System
2012-12-17 15:00:11

Lee Rannals for redOrbit.com — Your Universe Online University of Chicago researchers wrote in the journal Earth and Planetary Science Letters that they found the radioactive isotope iron 60 low in abundance, and well mixed in solar system material, leading to the notion that the force of an exploding star prompted the formation of the Solar System. Scientists look for remnants of stellar explosions in meteorites to help determine the conditions under which the solar system...

2012-03-29 13:55:12

A new chemical analysis of lunar material collected by Apollo astronauts in the 1970s conflicts with the widely held theory that a giant collision between Earth and a Mars-sized object gave birth to the moon 4.5 billion years ago. In the giant-collision scenario, computer simulations suggest that the moon had two parents: Earth and a hypothetical planetary body that scientists call “Theia.” But a comparative analysis of titanium from the moon, Earth and meteorites, published by...

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2008-06-19 14:15:00

Hikers visiting the Kilauea Iki crater in Hawaii today walk along a mostly flat surface of sparsely vegetated basalt. It looks like parking lot asphalt, but in November and December 1959, it emitted the orange glow of newly erupted lava. Now, a precision analysis of lava samples taken from the crater is giving scientists a new tool for reconstructing planetary origins. The results of the analysis, by the University of Chicago's Nicolas Dauphas and his associates, will be published in the June...

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2005-06-30 07:25:00

The University of Chicago's Nicolas Dauphas has developed a new way to calculate the age of the Milky Way that is free of the unvalidated assumptions that have plagued previous methods. Dauphas' method, which he reports in the June 29 issue of the journal Nature, can now be used to tackle other mysteries of the cosmos that have remained unsolved for decades. "Age determinations are crucial to a fundamental understanding of the universe," said Thomas Rauscher, an assistant professor of...

2005-06-29 21:07:56

The University of Chicago's Nicolas Dauphas has developed a new way to calculate the age of the Milky Way that is free of the unvalidated assumptions that have plagued previous methods. Dauphas' method, which he reports in the June 29 issue of the journal Nature, can now be used to tackle other mysteries of the cosmos that have remained unsolved for decades. "Age determinations are crucial to a fundamental understanding of the universe," said Thomas Rauscher, an assistant professor of...

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2005-01-26 07:15:00

University of Chicago -- Experiments led by Nicolas Dauphas of the University of Chicago and Chicago's Field Museum have validated some controversial rocks from Greenland as the potential site for the earliest evidence of life on Earth. "The samples that I have studied are extremely controversial," said Dauphas, an Assistant Professor in Geophysical Sciences at the University of Chicago and a Field Museum Associate. Some scientists have claimed that these rocks from Greenland's banded iron...