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It sounds like a perfect way to make money – scientists from The Australian National University (ANU) are now selling random numbers over the internet! But before you start your own business writing whatever number pops into your head, there’s something special about these numbers.

Perched high atop a giant shiny dish, sits a strange top hat. This hat is filled with high pressure steam, and it’s the secret to efficient solar power that can work even after the Sun sets. Welcome to the world of concentrated thermal energy.

Written by Emily Standen Did you know 2016 is the International Year of Pulses? Take your hand off you wrist though – this type of pulse refers to food, not your heartbeat!