Why do we yawn?
- Curious questions, Human body, Life Science
- October 17, 2014

Imagine diving in the waters off the coast of Australia and exploring the bright, colourful reefs in search of new and amazing forms of life. Suddenly you notice a clump of leafy seaweed floating next to you. But the seaweed is moving by itself. You look closer, and discover to your surprise that it’s not
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