A genuinely "down to earth" astronaut tells us what it's like living and working on the International Space Station. Colonel Cady Coleman explains how zero gravity changes the everyday things you do, and how circling planet Earth every 90-minutes will change your outlook on life. Plus, listeners share tales of their own unforgettable treks and travels, back on mother Earth. For more information on Travel with Rick Steves - including episode descriptions, program archives and related details - visit www.ricksteves.com.