A yawn lasts an average of 6 seconds and appears to cool the brain.
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The invention of the hypodermic syringe enabled effective drug delivery.
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Water is the only natural substance that commonly exists as a solid, liquid, and gas on Earth.
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The Olympic Games are held every four years.
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The axolotl can regenerate limbs and even parts of its heart.
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Border collies can learn hundreds of word-object associations.
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Water covers more than 70% of Earth's surface.
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The human body is about 60% water.
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Monoclonal antibody therapies treat various diseases.
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