Scientists announced that a section of Canadian bedrock is more than 4 billion years old and may have been part of Earth’s early crust.
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Dan Kulpinski is EarthSky's Washington Correspondent and an 11-year veteran of environmental journalism. He also publishes the GreenListDC. org site. Before joining EarthSky, he was a programming director at AOL, wrote the AOL Down to Earth blog and helped launch the Green Daily blog. .
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