Earthly riches heaven sent

Meteorites may have peppered Earth with precious metals

By Devin Powell, 16:30 PM September 7, 2011

A meteorite maelstrom that pummeled Earth and pocked the moon with craters billions of years ago may have had a silver lining — and linings made of other metals, too.

New evidence from old rocks suggests that many of the precious metals mined today were delivered to the planet by a bombardment of stony meteorites called chondrites that lasted for hundreds of millions of years.

“Adding a tiny amount of chondritic material could explain where many present-day metals came from,” says Matthia...

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