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You are here News Science 558-million-year-old fat molecule reveals world's earliest animal

558-million-year-old fat molecule reveals world's earliest animal

558m year old molecule foundScientists have discovered a fat molecule preserved in a 558-million-year-old fossil.

According to a new paper published this week in the journal Science, the discovery confirms Dickinsonia, a strange blob-like sea creature, as the earliest animal in the geologic record.

Dickinsonia is a member of the Ediacaran biota, a group of primitive organisms with frond-like patterns. The group emerged during the Ediacaran period, which lasted from 635 to 542 million years ago.

Scientists have previously argued whether Ediacaran species were animals. The fat molecule -- a type of cholesterol unique to animals -- found within the Dickinsonia fossil suggests they were.

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