'Metabolic trick' in squirrels' guts could help astronauts in deep space: researcher

In this June 18, 2017, file photo, thirteen-lined ground squirrels congregate near the ninth hole during the fourth round of the U.S. Open golf tournament at Erin Hills in Erin, Wis. (AP Photo/David J. Phillip, File) In this June 18, 2017, file photo, thirteen-lined ground squirrels congregate near the ninth hole during the fourth round of the U.S. Open golf tournament at Erin Hills in Erin, Wis. (AP Photo/David J. Phillip, File)

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