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Melting Mantle Linked To Great Oxygenation Event 2.5 Billion Years Ago
2012-05-25 04:38:16

Brett Smith for RedOrbit.com Oxygen-based life evolved on Earth because of geological events that occurred over 2.5 million years ago, according to Princeton University researchers who published a report this week in the online journal Nature. Based on geological evidence, scientists know that roughly 2.5 billion years ago, oxygen levels in the atmosphere exploded and eventually gave birth to our present atmosphere. This time period, dubbed the Great Oxygenation Event (GOE), appears to...


Word of the Day
snash
  • To talk saucily.
  • Insolent, opprobrious language; impertinent abuse.
This word is Scots in origin and probably imitative.