Astronaut Andrew Feustel reenters the Space Station after completing an 8-hour, 7-minute spacewalk at 10:12 a.m. EDT as NASA space shuttle Endeavour makes its last visit to the International Space Station on May 22, 2011 in space. After 20 years, 25 missions and more than 115 million miles in space, Endeavour is on its final flight to the International Space Station before being retired. (Photo by NASA via Getty Images)
A blue man reading a book by the light of a lamp hanging from a hook attached to his hat. Marginalia from a six-volume Gradual, tempera + gold leaf + ink on parchment, Italian, circa 1460-1480 (J. Paul Getty Museum, Los Angeles, ms. Ludwig VI 2).