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Originally posted by Remirah
Whilst trawling through the BBC News website on my lunch I came across this article.
Quote: "Oxygen levels on Earth reached a critical threshold to enable the evolution of complex life much earlier than thought, say scientists."
LINK: www.bbc.co.uk...
Quote: "Prior to the Lochinver discovery, the oldest rocks known to display this sulphur signature were 800 million years old. The new study now indicates oxygen levels in Earth's atmosphere were raised to such a level that the gas was permeating into lake waters and their sediment beds 1.2 billion years ago."
The difference between 800 million and 1.2 billion years is a strong indication that the books we "learn" from require ammending. They do not state that intelligent life existed right there and then, but to me suggests that we (the human race), have been here a for a few years more than we thought.
Remirah
Interesting post. I also noticed how there is increasing evidence that man and other mammals existed earlier than thought. Oddly I do not find anyone concerned that this information is not in new science texts.