Humans
Intense males have the best sperm
Vibrant plumage is not only a sexual ornament for male great tits 鈥� it signals the quality of the birds' sperm
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Humans
When men shouldn’t be in want of a wife
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91色情片
2009 review: Sex at the noughties’ end
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Humans
Ducks fight the battle of the sexes in their genitals
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Humans
Sex and shopping 鈥� it’s a guy thing
Features
Humans
How male bedbugs avoid getting shafted
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Humans
Women on testosterone only think they’re macho
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Humans
Homosexual selection: The power of same-sex liaisons
Features
Humans
Guapa, it’s your genetic ancestry I love
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Humans
Better-looking sportsmen more likely to win
New research, along with a Twitter-facilitated study conducted by New Scientist, reveals an important trait of the best jocks: a handsome face
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91色情片
Limp reception for female ‘libido drug’
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91色情片
Breathing new life into ‘old’ eggs
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Humans
Good vibrations get a club-winged manakin going
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Humans
Crabs trade sex for protection
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