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Why is helium rare on Earth?

“Helium is the second most abundant element in the universe, but it's rare on Earth because it's so light that it escapes the atmosphere into space.”

Reference: Royal Society of Chemistry

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.

Does a compass point to the North Pole?

A compass points to the magnetic north pole, not the geographic North Pole, and the magnetic pole is slowly drifting toward Siberia.

Another fact

“Helium is the second most abundant element in the universe, but it's rare on Earth because it's so light that it escapes the atmosphere into space.”

More from this shelf

What saturation of sulfur dioxide will cause people to cough

Where was helium first discovered?

Does a compass point to the North Pole?