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Why does helium make your voice squeaky?

“Helium makes your voice sound high and squeaky because sound travels faster through helium than through air, which changes the resonance of your vocal tract.”

Reference: Scientific American

What saturation of sulfur dioxide will cause people to cough

Sulfur dioxide is a colorless gas with a suffocating, choking odor. It is toxic to humans and concentrations as low as 8 ppm will produce coughing. Incredibly, in the Odyssey, Homer describes the burning of sulfur (formation of SO2) as a way that homes were 'fumigated'.

Where was helium first discovered?

Helium was discovered in the Sun's light in 1868, decades before it was found on Earth.

What does a musical saw sound like?

A musical saw has an eerie sound, similar to a human voice.

Another fact

“Helium makes your voice sound high and squeaky because sound travels faster through helium than through air, which changes the resonance of your vocal tract.”

More from this shelf

What saturation of sulfur dioxide will cause people to cough

Where was helium first discovered?

What does a musical saw sound like?