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Some people doodle flowers. Some doodle boxes. Vera Rubin doodled the universe.

For the first time, astronomers used galactic archaeology techniques to trace the chemical "fossil record" of a galaxy outside our own Milky Way.

Object 5 | This diagram of placental circulation captures a life's worth of research by Dr. Elizabeth Ramsey, who used X-rays and cineradiography to show that maternal blood enters the placenta in "fountain-like spurts," circulates around the fetal blood vessels, and drains back out. Notably, it was illustrated by Ranice W. Crosby, head of the Johns Hopkins Department of Art as Applied to Medicine and the first woman to direct a department at the Johns Hopkins University School of Medicine. #Carnegie125