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Holly loves drawing and her favourite colours have been sharpened a lot. Her most favourite colour, rose, is exactly 3cm long. She discovers that the teal pencil is exactly 4cm, and the almond pencil is exactly 6cm. What lengths from 1-10 cm can Holly make with her pencils?

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.

In 2023, Double Helix readers busted a bunch of brainteasers! Here are the tippy-top, most popular puzzles of the year.

What a year of activity! In 2023, we posted 25 hands-on STEM activities. Here are 5 of the most popular posts.

Can you find a different set of 5 positive whole numbers with the same stats?

Marsupials! Australia is famous for these incredible animals, and we believe you are fully koala-fied to have this quiz in the bag, er, pouch.

Scientists have been blown away by a recent detection of a gamma-ray burst (GRB), a type of strong cosmic explosion.