With Alison's wide range of free online Biology courses, you can explore and discover topics such as human anatomy, genetics and DNA, heredity, and so much more. Did you know that dolphins sleep by shutting down one half of their brain, literally sleeping with one eye open? Or that the length of your thumb is equal to the length of your nose? The world is a fascinating place, and everything living within it even more so. Biology is a Life Science that helps us understand...
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