2022-09-21, 10:40
The Oldest 3-D Heart from Our Vertebrate Ancestors Has Been Discovered
https://www.scientificamerican.com/artic...iscovered/
Fish fossils from Western Australia preserve the oldest 3-D hearts, livers, stomachs and intestines in a jawed vertebrate
https://www.scientificamerican.com/artic...iscovered/