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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
Only female mosquitoes bite — they need the protein in blood to develop their eggs. Males just feed on flower nectar.
Fun facts
Australia's Nullarbor Plain stretches about 200,000 km² without a single tree — its Latin name literally means 'no trees.'
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.