Due to technical issues, NASA astronaut Butch Wilmore ended up staying in space 4 months longer than expected. Today, he is back home, and he has made it perfectly clear that his space-travelling days are done. Dr. Rob Thacker from Saint Mary's University joins Andrew Pinsent for this week's edition of The Science Wire.

<p>Due to technical issues, NASA astronaut Butch Wilmore ended up staying in space 4 months longer than expected. Today, he is back home, and he has made it perfectly clear that his space-travelling days are done.&nbsp;Dr. Rob Thacker from Saint Mary's University joins Andrew Pinsent for this week's edition of The Science Wire.</p>