Really glad I stumbled on the Life Photo Archive on Google.
Google is hosting "millions of photographs from the LIFE photo archive, stretchingfrom the 1750s to today. Most were never published and are now available for the first time through the joint work of LIFE and Google."
The photo below is one of my favorites ... taken in 1965 (photographer: George Silk), it shows the G.O.A.T. standing over a crumpled Sonny Liston in their much-anticipated rematch. The look on Ali's face is devoid of the innocence seen after their first fight - in fact he looks downright angry. An interesting juxtaposition of how we think of Ali now.