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I’m Jasmine Fellows, Editor of CSIRO’s Double Helix magazine. As a girl, I’d often be found with my nose stuck in a book, comic, or magazine. I even read the earliest versions of our magazine, Double Helix News and The Helix.

Have you ever wondered why there are gaps in footpaths, and at the ends of bridges? Bridges, footpaths and many other structures get bigger when they heat up, and they need gaps so they don’t break on hot days. But Australian scientists have discovered a material that stays the same size over a wide range…