What is the most populous US state?
California is the most populous US state, with about 39 million people.
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- Where was Pluto discovered?
“Pluto was discovered in 1930 at Lowell Observatory in Flagstaff, Arizona, which in 2001 became the world's first International Dark Sky City.”
Reference: Lowell Observatory
More from this shelf
How big is the Grand Canyon?
The Grand Canyon in Arizona is about 277 miles long and about a mile deep.
Who discovered the four largest moons of Jupiter?
Italian scientist Galileo Galilei discovered Jupiter's four largest moons in 1610 using a telescope he improved himself.