When helium filled balloons are handed out at public events ... And on top of that, you have to keep adding air without tying a knot to over-inflate a balloon down here at sea level.

As Valentine's Day approaches, FirstEnergy Corp. is urging everyone to celebrate safely by keeping helium-filled foil balloons securely tied to a weight. Mylar balloons, which have a metallic ...

would ban any lighter-than-air-gas or helium balloons entirely and impose fines for violators. Current law allows the release of up to 10 helium-filled balloons in a 24-hour period. But critics ...

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, ...

But people flew much earlier than that by using hot air balloons as well as gas-filled ones. While the Montgolfier brothers get most of the credit for hot air ballooning in 1783, there are some ...