What causes double rainbows?

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Manage episode 220816437 series 1335729
By Discovered by Player FM and our community — copyright is owned by the publisher, not Player FM, and audio streamed directly from their servers.
What is deja vu? Why do certain magnets attract? Why do tea stains form in a ring? Can you scientifically work out someone's date of birth? How does mercury and lead stay in your body? Do mermaids exist? Do helium balloons defy gravity? What causes a double rainbows? Why does oxidised cholesterol cause heart attacks? Plus the life saving backpack for bees!

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