BIG REVEAL To the naked eye, the woman in the damaged daguerreotype (left) looks ghostly. A synchrotron helped researchers restore her portrait (right).
Left: National Gallery of Canada; Right: M.S. Kozachuk et al/Scientific Reports 2018
BUILT FOR SPEED Superconducting magnetic-levitation trains in Japan smashed a world speed record in 2015 in a test run.
FLYING COLORS Einstein’s theory of gravity has passed another test, based on the galaxy ESO 325-G004 (bright spot at center right). The experiment is the most precise check of general relativity on a galactic scale.