News

What’s inside a puffer fish

Puffer fish are best known for their ability to inflate like a balloon, but if you peer inside, you typically won’t find air. You’ll find water. Puffer fish inflate by sucking water into their mouths and then pumping it into their stomach, which inflates like an accordion. Parts of the […]
What’s inside a puffer fish
US

The fascinating way helium changes your voice

Inhaling helium and talking like Daffy Duck is a classic party trick. But not many know how helium works. Helium is much lighter than air, so sound waves move much faster through the gas. This amplifies the higher frequencies in your voice. The gas sulphur hexafluoride works in the opposite […]
The fascinating way helium changes your voice