Why are Rainbows so Colourful? Why do we sleepwalk? Why do some people spit when they're talking?

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By Molly Oldfield. Discovered by Player FM and our community — copyright is owned by the publisher, not Player FM, and audio is streamed directly from their servers. Hit the Subscribe button to track updates in Player FM, or paste the feed URL into other podcast apps.

In this week's show we answer three questions, from Wren, Abi and Tomos. They would like to know why rainbows are so colourful, why some people talk in their sleep and why some people spit when they're talking? We discuss where the rainbow's colours come from and we talk about Iris, the goddess of the rainbow, and why the colours of our eyes are named after her. We discover the parts of a sleep cycle when you're most likely to sleep talk and finally what causes spitting, how to stop it from happening, as well as the amount of saliva our bodies make each day - it's a lot more than you might think!

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