World's Oldest Animal Identified
A story in CNN (linked from elsewhere) reports that the world’s oldest fossil has now been dated. Rob Picheta writes:
The oldest known animal in the geological record has been identified, in a discovery that scientists are calling “the Holy Grail of palaeontology.”
Fat molecules discovered on the fossil of a mysterious creature called Dickinsonia have confirmed that that it lived 558 million years ago, making it the earliest known member of the animal kingdom.
The findings place its existence 20 million years before the Cambrian Explosion event, when major animals began appearing on the fossil record.
The fossil was first discovered by Australian scientists on a remote Russian cliff face by the White Sea in 1947 and the study, published Friday, brings to an end a decades-long debate to identify what it was.
Here is an uncredited photo of the animal:
How do we know it had “fat” molecules? Apparently, it was so well preserved that it had traces of cholesterol.
“Scientists have been fighting for more than 75 years over what Dickinsonia and other bizarre fossils of the Ediacaran Biota were: giant single-celled amoeba, lichen, failed experiments of evolution or the earliest animals on Earth,” Brocks said.
“The fossil fat now confirms Dickinsonia as the oldest known animal fossil.”
Another piece of the puzzle.
Source: http://scienceandcreation.blogspot.com/2018/09/worlds-oldest-animal-identified.html
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