Helium is lighter than air and just as the heaviest things will tend to fall to the bottom, the lightest things will rise to the top. Helium weighs 0.1785 grams per liter. Nitrogen, which makes up 80% ...

Scientists are starting to speak publicly about a lurking menace. This danger hovers in the background, silently stealing valuable resources from medical machinery. The dastardly culprit? Helium ...

Meet the woman who is on a mission to save marine life by using the big screen to expose the dangers of helium balloons and their impact on the oceans. Carly Wilson said she was pregnant and planning ...

At some point, most people have sucked the helium out of a balloon to get that squeaky, high-pitched voice - including one of the classiest ladies out there, Dame Helen Mirren - but it's time to put ...

Beaufort became the first city in South Carolina to ban outdoor balloon releases. Balloons are a hazard to wildlife.

It is something guaranteed to catch the eye of most young children on a day out - a huge bunch of floating, brightly-coloured helium balloons for sale. And for many people, a vital element in ...

On Wednesday of last week, some of you may have watched a man fly without a plane or hang glider. David Blaine, the illusionist and endurance artist, soared over the Arizona desert by holding onto 50 ...