This site uses cookies to improve your experience and to provide services and advertising. By continuing to browse, you agree to the use of cookies described in our Cookies Policy. You may change your settings at any time but this may impact on the functionality of the site. To learn more see our Cookies Policy.
OK
Dublin: 7 °C Wednesday 16 October, 2019
Advertisement

Evolution began earlier than previously thought

Scottish researchers have discovered the evolution of complex cells began 1.2 billion years ago – 400 million years earlier than scientists had believed.

SCOTTISH SCIENTISTS have concluded that the evolution of complex life forms began 400 million years earlier than previously believed.

Until now, it was thought an important change in the earth’s oxygen levels occured 800 million years ago, but the researchers found that this actually took place 1.2 billion years ago.

This increase in oxygen levels helped the development of more complex cells, such as the ones humans eventually emerged from.

The team of geologists analysed the chemical composition of rocks near Lochinver and found that an important bacterial group existed within the rocks 1.2 billion years ago.

Adrian Boyce from the Scottish Universities Environmental Research Centre in Glasgow said:

Our geochemical analyses have provided a clear signal that levels of oxygen in the atmosphere had increased to levels critical to the evolution of complex life – from which we ourselves emerge – much earlier than has been previously proven to date. This opens the door to a new understanding of the evolution of our planet’s atmosphere and the life it sustains.

The researchers’ paper was published in the science journal Nature.

  • Share on Facebook
  • Email this article
  •  

About the author:

Read next:

COMMENTS

This is YOUR comments community. Stay civil, stay constructive, stay on topic. Please familiarise yourself with our comments policy here before taking part.
write a comment

    Leave a commentcancel