The McDonald Observatory in Fort Davis on June 18, 2015.
The McDonald Observatory in Fort Davis on June 18, 2015. Cooper Neill

Scientists have known that space travel can produce changes in vision, but precisely why was a mystery until a former astronaut and recovered cancer patients allowed researchers to measure pressure inside their brains. (KERA)

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Cassandra Pollock was a state politics reporter for the Tribune. She joined the Tribune full-time in June 2017 after a fellowship during the 85th Texas Legislature. Pollock spent her first two years at...