Why Students Are Sending Earth Sounds To Astronauts

Space can feel awfully lonely. One professor let his students record soothing sounds from Earth and send them to the ISS.

Last summer, Greg Smith was standing in front of a Home Depot when he got an unexpected phone call. When he answered, the voice of NASA astronaut Kjell Lindgren greeted him on the other end. "I said, 'Oh! You're down!' and he said, 'No, I'm up here,'" Smith recalls. "He had called me from space."

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