Helium is one-seventh as dense as the air we breathe. When you inhale the gas and then exhale, the helium escaping from your lungs causes your vocal cords to vibrate much faster than normal. The result is a high-pitched, squeaky voice.
(Source: Wired)
Similar Articles:
- It’s Fun to Know: The Rat-Whisker Navigation System – Rats have poor eyesight and live in sewers, tunnels, and other dark places. So how do they get aroun…
- It’s Fun to Know: The Fish That Lives in a Tree – Scientists have recently discovered a species of fish that can live inside trees for several months …
- It’s Good to Know: Never Worry About Losing Your Voice – An American company has developed a neckband that can translate thoughts into speech. The device, ca…
- The Macy’s Thanksgiving Day Parade – The Macy’s Thanksgiving Day Parade has been held every year since 1924 (except for a two-year inter…
- It’s Fun to Know: Why the Early Bird Catches the Worm – Why are "early birds" able to feast on earthworms after a rainstorm? Worms usually hate co…
- It’s Good to Know: Your Morning Whiff of Joe – Coffee is part of the morning wake-up ritual for millions of people worldwide. But recent research b…
- It’s Fun to Know: About Microbots – Researchers at the Korea Institute of Technology are designing six-legged robots tiny enough to trav…