If you saw a giant metallic balloon with fins floating up ... To reach the stratosphere, the HAPS is filled with helium, which helps the aircraft conserve energy during ascent and operation.

When you accelerate in a car, the seat you are sat in pushes you forwards, with the result that you feel like you are being ...

Small helium-inflated balloons, however, are allowed aboard aircraft in the United States. Still, some airlines might ask for ...

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. It's hard to say whether the knot stays intact when a helium balloon explodes ...

Helium is lighter than air. Which means sound moves faster through ... It’s a classic party trick- suck down a balloon and you’ll sound like Daffy Duck every time. But helium isn’t the ...

People in Suffolk were left bewildered when they saw what looked to be a huge hot air balloon last night over Sudbury and ...

DALLAS, Texas -- Officials said a large balloon U.S. Customs and ... of an upper chamber filled with helium, and the lower chamber is a pressurized air compartment. Customs and Border Protection ...