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Fact 4 Millions of years ago, Earth had dragonflies the size of birds. A prehistoric insect called Meganeura had a wingspan over two feet long. Imagine seeing that flying toward you. Fact 3 There’s a planet where the weather would instantly kill you. On HD 189733 b, winds move at over 7,000 kilome…

Fact 4 Millions of years ago, Earth had dragonflies the size of birds. A prehistoric insect called Meganeura had a wingspan over two feet long. Imagine seeing that flying toward you. Fact 3 There’s a planet where the weather would instantly kill you. On HD 189733 b, winds move at over 7,000 kilometers per hour… and instead of water… it literally rains molten glass sideways.