Associate Professor Jochen Brocks commented, “These fossils comprise our best window into earliest animal evolution and are the key to understanding our own deep origins.” Yes, in the sense that sudden emergence rather than a long, slow Darwinian process seems more likely all the time.
Rather, he thinks, it is an unknown type of life form, which belonged to “an alien clade,” not certainly related to later life forms. Readers will recall that fats (sterols) were recently recovered from a 558 million-year-old fossil entity, Dickinsonia, which was previously uncertainly classified but is now classified as an animal as a result. […]
Recently, some readers asked whether the recent Dickinsonia fossil “fats” find from 558 mya featured cholesterol. Our physics color commentator Rob Sheldon explains further: Cholesterol was not found by these researchers, nor did they make announcements of soft tissue in a fossil. What they did find were the breakdown products of cholesterol called “sterols”. Plants make […]
Yes, you read that right and our physics color commentator Rob Sheldon explains why it was possible below. From ScienceDaily: Scientists from The Australian National University (ANU) and overseas have discovered molecules of fat in an ancient fossil to reveal the earliest confirmed animal in the geological record that lived on Earth 558 million years […]