A Living Fossil

19 Jan 2020

At https://archaeologynewsnetwork.blogspot.com/2020/01/living-fossil-may-up... ... a living fossil may upend a basic tent of evolutionary theory. Courtesy of a UC of San Franscisco research team. Natural selection,  it seems, also occurs at the level of the epigenome (a term that refers to an assortment of chemical annotations to the genome that determine whether, when, and to what extent, genes are activated. This finding is said to throw overboard the mainstream view that over geological timescales natural selection acts exclusively on variations of the genome sequence itself.

At https://phys.org/news/2020-01-species-prehistoric-scorpion-early-explore... ... at this link we have the earliest known scorpion fossil - from 437 million years ago. See also https://doi.org/10.1038/s41598-019-56010-z

At https://phys.org/news/2020-01-dinosaur-china-dinosaurs-grew-differently.... ... as new species of feathered dinosaur found in China preserves feathers and bones tha provide information of how dinosaurs grew and how they differ from birds ...

   ... see also https://doi.org/10.1002/ar.24343 ... and the same story is at https://archaeologynewsnetwork.blogspot.com/2020/01/new-dinosaur-discove...

At https://phys.org/news/2020-01-fossils-largest-theropod-date-australia.html ... fossils of the largest Therapod found, to dat, in Australia ...

   ... see also https://doi.org/10.1098/rsos.191462