I wonder what additional work could be done on the balloon. Many of these articles have noted that they end up popping due to the lack of atmospheric pressure on the outside and thus they expand from roughly one meter across to twenty meters across at those lofty heights. Clearly weather balloons can go that height but since they go high enough, no additional engineering has been done there. It would be interesting to see if there were some way of keeping the weather balloon from popping for longer. Perhaps a mesh netting covering the balloon but it would have to find some way to get out of the way of the parachute.
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