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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.

This quiz is all about growth! Can you grow your knowledge and get the high score?

Right now, there are about 7.8 billion people on Earth, and that number keeps on growing. But could this growth be coming to an end? Experts have made a new prediction that Earth’s population will not reach 10 billion people. And the reasons why are surprisingly positive.

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!