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Have you ever wondered why the sky is blue in the morning, and then orange in the evening? Incredibly, milk can show us why!

CSIRO is marching in Mardi Gras this weekend (2 March)! To celebrate the kaleidoscope of human diversity, we’re flying this colourful rainbow quiz.

This quiz is tied up with a rainbow! Can you earn that pot of gold? Or have you bitten off more than you can hue?

These questions will help you to see the light. Take the quiz and see if you shine brightly.

Here’s a great excuse to get your parents to buy lollies! All it takes is some warm water to reveal a beautiful rainbow.

Welcome to Double Helix magazine’s Q&A section – Microscope. We take a close look at small questions full of big ideas. Q: What is the weight of a rainbow?