Earth as seen by the Expedition 47 crew on May 31, 2016, from the International Space Station — looking from northwestern China on the bottom into eastern Kazakhstan. The large lake in Kazakhstan with golden sun glint is the crescent-shaped Lake Balkhash, the second largest lake in Central Asia. NASA hide caption

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A tourist at the Bradbury Science Museum in Los Alamos, New Mexico, in February examines a full-size replica of the "Fat Man" atomic bomb which was dropped on Nagasaki, Japan, on Aug. 9, 1945. Los Alamos is home to the Los Alamos National Laboratory which was established in 1943 as part of the Manhattan Project. Robert Alexander/Getty Images hide caption

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"Self-regulation is about identifying the causes and reducing the intensity of impulses and, when necessary, having the energy to resist," psychologist Stuart Shanker writes in his book, Self-Reg: How to Help Your Child (and You) Break the Stress Cycle and Successfully Engage with Life. LA Johnson/NPR hide caption

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Members of the Juno team celebrate at the Jet Propulsion Laboratory in Pasadena, Calif., after they receive confirmation from the spacecraft that it successfully completed the engine burn and entered the orbit of Jupiter on July 4. Aubrey Gemignani/NASA hide caption

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