I came across this a while back, and since today would have been the 75th birthday of John Lennon, it seems the right day to present it!   I think Spock would have grokked The Beatles!  What a pleasure to have two of my great joys in the same artistic universe!  Unfortunately, I do not know the artist, and as you can see, all the original prints of this were sold out — but at least I have this image!   🙂   (To see more Beatle-flavored Trek stuff, see here, here, here, here, here, and here.