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How it all factors into true love is even more mysterious.
But a short list of scientific rules for the game of love is emerging.
Its many purposes — a blow and peck for good luck on dice, lips to ground after a rocky boat ride, kisses in the air to an acquaintance, and the long slow smooches of Hollywood — have different meanings yet are similar in nature. Kissing is more than just showing GIPHY Yet, not all cultures or mammals kiss.
Some mammals have close contact with each others' faces via licking, grooming, and sniffing, which may transmit the necessary information.
Nearly all ant colonies also have some fertile males called "drones" and one or more fertile females called "queens".
The only places lacking indigenous ants are Antarctica and a few remote or inhospitable islands.Symmetry equals sex Starting at conception, the human body develops by neatly splitting cells.If every division were to go perfectly, the result would be a baby whose left and right sides are mirror images. Genetic mutations and environmental pressures skew symmetry, and the results have lifelong implications.In the end, lasting love depends at least as much on behavior as biology.But the first moves are made before you're even born.