💡 Everyday Science

Explanation: The average normal human body temperature is 37°C (98.6°F). A fever is generally defined as a temperature above 38°C (100.4°F).

Explanation: Vitamin D (the sunshine vitamin) is synthesized in the skin when ultraviolet B (UVB) rays from sunlight strike the skin. It is essential for calcium absorption and bone health.

Explanation: An adult human has 32 permanent teeth, including 4 wisdom teeth (third molars). Without wisdom teeth, the count is 28. Children have 20 primary (milk) teeth.