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.

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

Helium was non-flammable and thus a safer ... But without the pioneers of the U.S. Air Force’s Balloon program, NASA may never have achieved all that all that it has to date.

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 ...

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 ...

In the thin air at 95,085 feet, the helium in one of the balloons had expanded so much that the balloon exploded, as planned. Powell sent a command to detach the other, and the vehicle descended ...

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 ...