Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.
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Medication errors are three times higher among children and infants than with adults.
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Not getting enough sleep can greatly weaken the immune system. Lack of sleep makes you more likely to catch a cold, or more difficult to fight off an infection.
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In 1864, the first barbiturate (barbituric acid) was synthesized.
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It is difficult to obtain enough calcium without consuming milk or other dairy foods.
Basic energy of a human life
Life cycle of moss
Life cycle of Plasmodium
Carnivores such as these wild dogs have skeletal adaptations for eating meat.