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Questions tagged [population]

The tag has no usage guidance.

14
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0answers
2k views

Were all but one of the US presidents descended from King John of England?

The Daily Mail says: A 12-year-old girl created family tree linking 42 of 43 U.S. presidents to King John of England, who signed the Magna Carta in 1215. Only the eighth president, Martin Van ...
8
votes
0answers
309 views

Does the availability of modern contraception only explain 10% of human fertility reduction?

It is widely assumed that the most important factor leading to large family sizes and fast population growth is the lack of availability of contraception. But Tim Worstall's book Chasing Rainbows ...
1
vote
0answers
135 views

Do humans, pets and livestock drastically outweigh all other land mammals?

Does this picture demonstrate the actual proportions well (from xkcd)?