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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.

They’re cute, colourful and … clever? Scientists just discovered that common clownfish can count! Or at least, they can recognise the number of stripes on other fish. And it helps them pick their friends from foes.

Don’t have any sour candy on hand? Make something even sweeter! These glitter grapes come in all kinds of fruity flavours.

Palaeontologists have wondered for over a hundred years – how did dinosaurs evolve flight and become birds? To find the answer, researchers built a robot dinosaur!

Let’s make a mini greenhouse! This self-sustaining little ecosystem will look fantastic on your desk or in your bookshelf.

Australian farmers produce a whopping 6.2 billion eggs each year. Unfortunately, most of the resulting eggshells end up in landfill. Australian scientist Manickam Minakshi Sundaram hopes to change this with a breakthrough use for eggshells: batteries!

We’d really be in the dark without our only natural satellite, the Moon. Now lunar rove on over and moon rock this quiz! (As always, we make no Apollo-gees for puns.)

Extra! Extra! Read all about Double Helix Extra’s most eye-grabbing headlines from 2023:

What’s bold, bright, pink and could explore Mars? The Monash Nova Rover team designed the Waratah rover to spark innovation and conversations.

Get ready because it’s megaquiz time! Put your science knowledge to the ultimate test with 10 random questions that have appeared on our quizzes this year. With 100+ questions to draw from, you’re sure to find a challenge.