By — PBS News Hour PBS News Hour Leave your feedback Share Copy URL https://www.pbs.org/newshour/show/newshour-shares-7 Email Facebook Twitter LinkedIn Pinterest Tumblr Share on Facebook Share on Twitter Transcript Audio What are the long-term effects of living in space? Astronaut Scott Kelly is now halfway through a year-long mission. In our NewsHour Shares video of the day, NASA offers a progress report, comparing Scott with his twin brother, retired astronaut Mark Kelly, who remains on Earth. Read the Full Transcript Notice: Transcripts are machine and human generated and lightly edited for accuracy. They may contain errors. GWEN IFILL: Today marks the halfway point in a year-long mission on the International Space Station. The goal? To figure out the long-term effects on the human body from being out of this world.They are comparing NASA astronaut Scott Kelly, up in the station, with his identical twin brother, retired astronaut Mark Kelly, back here on Earth. Listen to this Segment Watch Watch the Full Episode PBS NewsHour from Sep 15, 2015 By — PBS News Hour PBS News Hour