Explore evolution in your own home, with this lavishly illustrated wall poster from The Open University
There is plenty of evidence to support the theory of evolution by natural selection, not least the discoveries of genetics. The unity of the genetic code, the DNA instructions that specify the make-up of the proteins that the bodies of organisms are built from, confirms that all life on earth had a common ancestry.
Charles Darwin sketched the branches of a tree in one of his notebooks to illustrate the idea that all life forms branched out from a common ancestry. Since then the tree of life image has persisted as an aid to understanding evolution.
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