Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.
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Although puberty usually occurs in the early teenage years, the world's youngest parents were two Chinese children who had their first baby when they were 8 and 9 years of age.
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Throughout history, plants containing cardiac steroids have been used as heart drugs and as poisons (e.g., in arrows used in combat), emetics, and diuretics.
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The familiar sounds of your heart are made by the heart's valves as they open and close.
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The people with the highest levels of LDL are Mexican American males and non-Hispanic black females.
Eye Color Is a Sex-Linked Trait in Drosophila (Part 3)
Color monitor for a computer system.
A color-coded record.
How to use Cramer's rule to solve a second-order determinant (Question 1)
Color-enhanced electron micrograph of E. coli undergoing cell division