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The study of the total genetic information, or gene pool, of a group, is called population genetics. Among the variables important to population genetics are the frequencies of particular alleles and genotypes. If these frequencies remain stable over...

(from Latin, copulare: to join together) Copulation in fact refers in general to the joining together of things. Most com-monly however it is used to refer to sexual intercourse. See also: sexual behaviour; social...

see copulation; sexual...

In biology, mating is the pairing of opposite-sex or hermaphroditic internal fertilization animals for copulation and, in social animals, also to raise their offspring. Mating methods include random mating, disassortative mating, assortative mating, or...

Politics: Hillary Clinton's handlers are running away from Segolene Royal after her loss in France. Aside from being women, they insist, the two don't have much in common. Really?Truth is, Clinton and Royal share a significant common bond beyond their gender: Their positions on many...

The Chinese mitten crabs found around the Chesapeake and Delaware bays in recent months are mating, scientists confirmed, raising concerns the invasive crab could be making a home in the area.Scientists say 10 mitten crabs have been reported in the last three years, two of...

They're the rock stars of the bird world these days, the Rolling Stones of the feathered set. But the penguins at the Shedd Aquarium are showing it's not all film premieres _ think "Happy Feet" and "March of the Penguins" _ and sushi. It's rocks....

This was the first time Allen Iverson enjoyed watching the Philadelphia 76ers lose. Iverson scored 38 points in the Denver Nuggets' 109-96 victory over the 76ers on Sunday night. He had a shot at 40 but dribbled out the final few seconds at midcourt, tossed...