What year was this photograph taken? Study it, then reveal the answer below — or play it as a round and see how much HP you keep.
Albert Einstein sticks his tongue out for photographer Arthur Sasse after his 72nd birthday party on March 14, 1951. One of the most reproduced and parodied pictures of Einstein, according to reports, Einstein liked the photo so much that he requested International News copies of them for personal use as gifts.
