Ancient organisms discovered in Canadian gold mine

Scientists have suspected that the three known domains of life -- eukaryotes, bacteria, and archaea -- branched off and went their separate ways around three billion years ago. But pinning down the time of that split has been an elusive task.

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<p><a href="http://www.physorg.com/news106849384.html">Ancient organisms discovered in Canadian gold mine</a></p> <p>Scientists have suspected that the three known domains of life -- eukaryotes, bacteria, and archaea -- branched off and went their separate ways around three billion years ago. But pinning down the time of that split has been an elusive task.</p>