Is winter coming? Find out in this episode of Space Time. Get your own Space Time t­shirt at http://bit.ly/1QlzoBi Tweet at us! @pbsspacetime Facebook: facebook.com/pbsspacetime Email us! pbsspacetime [at] gmail [dot] com Comment on Reddit: http://www.reddit.com/r/pbsspacetime We’re living in a brief window of time where our planet isn’t frozen underneath a giant layer of glaciers. How much longer will the moderate climate that we’ve come to know as “normal” continue? What causes these dramatic shifts in temperature that thaw our planet and then throw it back into a state of deep freeze? This episode looks at how the changes in our planet’s orbit and rotation impacts our climate. Written and hosted by…