I am Astronaut Mike Hopkins and I recently returned to Earth after six months on the space station. AMA!
I'll be answering your questions from 3-4 p.m. EDT Monday, June 9. I’ve had the privilege of working and living in space for 166 days, most recently returning to Earth March 10, 2014. During my stay aboard the International Space Station, I had the opportunity to conduct hundreds of hours of valuable scientific research in areas including human physiology, medicine, physical science, Earth science and astrophysics. I also conducted two spacewalks with my NASA colleague Rick Mastracchio, totaling 12 hours and 58 minutes. As a lifelong fitness enthusiast, I also used the unique environment of space to share several of my in-orbit workouts on social media. Ask me anything!
Update, 4:00pm EDT: That's all the time I have today. I'm sorry I couldn't get to all your questions. Thanks for asking some good questions. I hope you will keep following along with my colleagues currently up on the station. Daily updates, images, and videos are posted at http://www.nasa.gov/station.