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female
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external genitalia
Know the factors that favor higher production of baby boys than girls which result in skewed sex ratio with human populations
Discover
Close up of praying mantis walking on stone ground against a blurred background in Japan
6 Animals That Eat Their Mates
NBA Lakers Celtics Finals Kevin Garnett shooting.
10 Great Sports Rivalries
Aspirin pills.
7 Drugs that Changed the World
Close up of books. Stack of books, pile of books, literature, reading. Homepage 2010, arts and entertainment, history and society
12 Novels Considered the “Greatest Book Ever Written”
Alpaca and Llama side by side
What’s the Difference Between Llamas and Alpacas?
Cathedrale St.Jean in Lyon, France has a 14th-century astronomical clock that shows religious feast days till the year 2019; Perpetual Calendar
Ten Days That Vanished: The Switch to the Gregorian Calendar
Periodical Cicada, Adult, Magicicada spp. Requires 17 years to complete development. Nymph splits its skin, and transforms into an adult. Feeds on sap of tree roots. Northern Illinois Brood. This brood is the largest emergence of cicadas anywhere
Why Do Some Cicadas Appear Only Every 17 Years?

female

sex

Learn about this topic in these articles:

early theories of heredity

  • Why are children slightly different from their parents?
    In heredity: Prescientific conceptions of heredity

    …the relative contributions of the female and the male parents were very unequal; the female was thought to supply what he called the “matter” and the male the “motion.” The Institutes of Manu, composed in India between 100 and 300 ad, consider the role of the female like that of…

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