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Which of these 3 well-known weather sayings are backed up by science?

In the days before weather forecasts, people often turned to sayings and proverbs to provide an indication of what tomorrow’s weather might bring. “Cows lie down when it‘s about to rain" “Red sky at night, shepherd’s delight" “It’s too cold to snow” Which of these sayings actually work? And do any of them have any basis in science?
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