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Fun facts
A day on Venus is longer than its year: it takes 243 Earth-days to spin once, but only 225 to orbit the Sun.
Fun facts
You'll never see a rainbow at high noon. They only appear when the sun sits below about 42° — so mornings and late afternoons.
Fun facts
Only female mosquitoes bite — they need the protein in blood to develop their eggs. Males just feed on flower nectar.
Fun facts
Mark Twain was born in 1835 when Halley's Comet appeared, and died in 1910 the next time it returned — exactly as he'd predicted.