1 min to read
It's hard to overstate the importance of trees. Their appearance more than 300 million years ago was a turning point for Earth, helping transform its surface into a bustling utopia for land animals. Puzzle over six amazing photos showcasing the majesty of trees.
Most trees have a layer known as the cork cambium, the tough outer layer of the tree. It protects the tree from the elements – from scorching by the sun or drying by wind. It also helps to ward off fungi and the many insects and mammals that would otherwise take easy advantage of the sugar-rich sap or the wood that it surrounds.
Play this puzzle with the Pics n Mix app!
Pics n Mix is quick and easy to learn, and the short video below explains everything you need to know.
Just choose a puzzle and click the Play button. Drag and drop the pieces to where you think they should be. If you have chosen "plus rotation" it means some of the pieces are flipped top to bottom or right to left. If you tap a piece once, it will flip from top to bottom. and if you double tap it, it will flip from left to right.