520-Million-Year-Old Fossil Discovery Reveals How Ancient Cephalopods Learned to Float
An international team of researchers has discovered a 520-million-year-old fossil in South China that sheds light on the evolutionary origins of cephalopod buoyancy. Named Eoceras shaanxiense, the tiny specimen measures only a few millimeters and features the oldest known siphuncle—a specialized internal tube that allowed ancient marine creatures to regulate water and gas balance, revolutionizing … Read more