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

Back in the California gold rush, many people were tricked by a shiny yellow crystal known as fool’s gold. Now, more than 100 years later, scientists are flipping the script. Australian and Chinese researchers have found where real gold hides inside fool’s gold!

Through thick and thin, we love a quick quiz! We think this is one of our hardest quizzes yet. Do you have the knowledge to thin out the clues and get full marks?

You might not think about it much, but there’s an amazing planet under your feet. Dig down about 50 kilometres and the rocky crust begins to give way to the hot, soft mantle. Deeper down, the rocks get hotter and runnier, reaching temperatures of thousands of degrees.

It’s time to push the limits! Can you take it to the maximum and get a high score?

Imagine you have a massive pile of rocks. You think there might be gold in the rocks, not much, but enough to make some money. Now it might be easier to find out how much hidden gold there is.

How would you find out where to strike gold? Turns out termites might have the answer.