An air-filled balloon cooled in liquid nitrogen will shrink. When warmed back up in air, the balloon re-inflates. Skilled individuals can make balloon animals to dunk in liquid nitrogen. Otherwise, ...

LUBBOCK, Texas — Multiple volunteer fire departments responded to a “runaway research balloon” on Friday afternoon that was a possible danger to Bledsoe and Morton, according to the ...

Several pre-shrunk balloons are pulled from a single Dewar of liquid nitrogen and inflate back to their original size. Blow balloons up and tie off.. Tie string at top of balloon. Shrink balloons by ...