Someone reminded me of the IMAGE/LINK I used in this particular post …
If you click on the link for the old posting, and then scroll down a little, you’ll find a fairly dynamic and compelling illustration… so go ahead and do a SAVE-AS for your own purposes!
The interesting thing about this illustration is it just takes ONE PART of an animal… it’s EAR … and it builds an entire lineage - - from land-based mammal to completely aquatic mammal - - based on the trace-able shifts of each bone … one way or the other. EARS! "As Marc Antony got to say … "Lend ME your ears!