For years the mammals living in the era of dinosaurs have been thought of as tiny shrew-like creatures scurrying through the underbrush. Now the discovery of a furry aquatic creature with seal-like teeth and a flat tail like a beaver has demolished that image.
Some 164 million years ago the newly discovered mammal was swimming in lakes in what is now northern China, eating fish and living with dinosaurs.
[Science must have the flexibility to be wrong and adapt. Don’t trust in eugenics because evolution is "true", but on philosophical grounds – on principal – that we might become better humans than we are, and that we can do this of our own will.]