User blog comment:Riley Heligo/Seriously EA?/@comment-109.204.150.196-20120220115949

The approx landing zone is not that hard to calculate, if you have accurate wind data. On all the layers balloon goes trought. Problem I think we have here is the temperature. In case they go with proper balloons, the container, what ever it is, will be exposed to -50C at least, most likely more. Falling down is not an issue for such a light object. Oh yeah, USSR & USA agreed that "space" begins at 80km (~50miles) back in the days of space race. You'll average weather balloon wont reach even half of that.