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  2. Pyrite - Wikipedia

    en.wikipedia.org/wiki/Pyrite

    Pyrite is used with flintstone and a form of tinder made of stringybark by the Kaurna people of South Australia, as a traditional method of starting fires. [17] Pyrite has been used since classical times to manufacture copperas (ferrous sulfate). Iron pyrite was heaped up and allowed to weather (an example of an early form of heap leaching ...

  3. Age and female fertility - Wikipedia

    en.wikipedia.org/wiki/Age_and_female_fertility

    A study of a population of French women from 1670 and 1789 shows that those who married at age 20–24 had 7.0 children on average and 3.7% remained childless. Women who married at age 25–29 years had a mean of 5.7 children and 5.0% remained childless. Women who married at 30–34 years had a mean of 4.0 children and 8.2% remained childless. [20]

  4. 270 Reasons Women Choose Not To Have Children - The ...

    data.huffingtonpost.com/2015/07/choosing-childfree

    The HuffPost/YouGov poll consisted of 3,000 completed interviews conducted May 8 to 29 among U.S. adults, including 124 women who are childless and reported not wanting children in the future. It was conducted using a sample selected from YouGov's opt-in online panel to match the demographics and other characteristics of the adult U.S. population.

  5. Pregnancy over age 50 - Wikipedia

    en.wikipedia.org/wiki/Pregnancy_over_age_50

    Mrs. Fred. J. Turley, 59, Wife of a 65-year-old Helena, Ark. Barber says the birth of her sixth child was "An answer to a prayer." Their other children are dead. Two died in the war. Dr. Eva Dodge of the University of Arkansas medical school termed Mrs. Turley's case "Very Unusual." The mother will be 60 in April 1949. [120] 60 years 1996

  6. Female infertility - Wikipedia

    en.wikipedia.org/wiki/Female_infertility

    Men and women can also turn to divorce in attempt to find a new partner with whom to bear a child. Infertility in many cultures is a reason for divorce, and a way for a man or woman to increase his/her chances of producing an heir. [63] [65] [67] [70] When a woman is divorced, she can lose her security that often comes with land, wealth, and a ...

  7. Women may get more health benefits from regular ... - AOL

    www.aol.com/finance/women-may-more-health...

    The observational study, which analyzed the exercise habits of more than 400,000 U.S. adults, found that compared to being inactive, engaging in regular physical activity lowered women’s ...

  8. Voluntary childlessness - Wikipedia

    en.wikipedia.org/wiki/Voluntary_childlessness

    By March 2020, 10% of 30-year-old Dutch women questioned had not had children out of her own choice, and did not expect to have any children anymore either; furthermore, 8.5% of 45-year-old women questioned and 5.5% of 60-year-old women questioned stated that they had consciously remained childless.

  9. Pyrrhotite - Wikipedia

    en.wikipedia.org/wiki/Pyrrhotite

    Also, the mineral pyrite is both the most common and most abundant sulfide mineral in the Earth's crust. [6] If rocks containing pyrite undergo metamorphism, there is a gradual release of volatile components like water and sulfur from pyrite. [6] The loss of sulfur causes pyrite to recrystallize into pyrrhotite. [6]