Just to add a little to the discussion, after reading the article I was curious to know and understand what the ancient land-dwelling ancestors to modern day wh

Just to add a little to the discussion, after reading the article I was curious to know and understand what the ancient land-dwelling ancestors to modern day whales looked like, and found this: http://evolution.berkeley.edu/evolibrary/article/evograms_03 http://evolution.berkeley.edu/evolibrary/article/evograms_03 It's very fascinating and clearly shows the evolution of whales in great detail; apparently whales and hippos are related, but are two branches from a common ancestor (which I took from this that we don't yet know what ancestor?). Regardless, after looking at that page, I clicked around the site - and found the whole thing really intriguing and detailed.