RT @coreyspowell: How exciting is the moon? See Gene Cernan’s heart rate during the last-ever moon walk. hq.nasa.gov/alsj/a17/image… http://t.co…
RT @coreyspowell: How exciting is the moon? See Gene Cernan’s heart rate during the last-ever moon walk. hq.nasa.gov/alsj/a17/image… http://t.co…