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MEDICINE   SCIENCE  
Life may have emerged a billion years earlier than we thought
- Follow Earth on Google Earth holds memories far older than humans. These memories rest inside ancient stones shaped by heat, pressure, and time. Many early signs of life vanished as these rocks changed deep within the crust. Yet scientists continue to search for faint signals that survived. A new study reveals chemical traces of biology in rocks older than 3.3 billion years. The research suggests that ...

Source: earth.com