
But a new analysis of the microscopic structures has returned a surprising result - that they are not biological material at all.
In a new study published in Nature Geoscience, the US scientists suggest they may in fact simply be a series of rock fractures filled with crystals'.
"Surprising?" - Not to me it ain't!
Read more: http://www.dailymail.co.uk/sciencetech/article-1370126/Earliest-known-life-earth-just-cracks-rock-controversial-new-study-finds.html#ixzz1HgiUWVEW