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By Celia Berrell Cutting through tree trunks from bark to bark, we’ll see lots of circles in light wood and dark.

From big cats to tiny sub-atomic particles, this quiz will test your scientific know-how!

Written by Sarah Kellett Bottles of champagne may send corks sky high, but spacecraft take cork as far as Mars. Their success depends on it. Cork reached new heights as part of the protective aeroshell that insulated the Mars rovers Spirit, Opportunity and Curiosity from the intense heat of entering the Martian atmosphere.