8. Oldest traces of life on Earth found in Quebec, dating back roughly 3.8 billion years
from CBC News
From March 9, 2017:
A team of international scientists has found the oldest record of life on Earth in Northern Quebec, dating back at least 3.8 billion years. Our solar system formed about 4.6 billion years ago. Scientists believe that about 4.3 billion years ago, water already existed on Earth's surface. However, what isn't known is when the earliest life emerged. Recent research has found life at 3.4 billion years and, most recently 3.7 billion years.
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