|Ancient, dome-like rock structures contain clues that life was active on Earth
3.45 billion years ago, according to new research — and the findings could help
shed light on life’s history on Earth and other planets, including Mars.
|dome- or column-like sedimentary rock structures formed in shallow water, layer
by layer, over long periods of geologic time.
|have a biological origin; they’re formed with the help of layers of microbes
that grow in a thin film on the seafloor
|“Raman spectroscopy showed that the organics had been ‘cooked’ to the same
burial temperature as the host rock, again indicating the organics are not young
|team have collected enough evidence that it’s no longer a great leap to accept
the stromatolites as biological in origin. And the researchers say the
implications of the findings don’t stop at life on Earth