4 ms·
As far as I can tell, there is some degree of convergent evolution, with current sea mammal all coming from three separate earth-to-sea ancestors. There’s the s
by sopooneo 4y ago
As far as I can tell, there is some degree of convergent evolution, with current sea mammal all coming from three separate earth-to-sea ancestors. There’s the seal, sea lion, walrus line. The whale, dolphin line. And finally the humble sea cow / manatee line.
- Zuider 4y agoIn that scheme, otters, and possibly beavers, might represent the beginning of the process. The ancestors of the whale looked like furry alligators.