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All the world’s bacteria stacked on top of each other would stretch for 10 billion light-years. Together, Earth's 0.001mm-long microbes could wrap around the Milky Way over 20,000 times.

The fear of long words is called Hippopotomonstrosesquippedaliophobia. The 36-letter word was first used by the Roman poet Horace in the first century BCE to criticise those writers with an unreasonable penchant for long words. It was American poet Aimee Nezheukumatathil, possibly afraid of their own surname, who coined the term how we know it in 2000.

Earth’s rotation is changing speed. It's actually slowing. This means that, on average, the length of a day increases by around 1.8 seconds per century. 600 million years ago a day lasted just 21 hours.