Time to mate nuclear warheads with Iran's growing arsenal of longer and longer range ballistic and cruise missiles.
Cherry's owner says she's still too young to mate, but they'll be back when she comes of age.
Between June and November, humpback whales congregate in Tonga to mate and breed.
The need for a screw with threads shaped to mate with the substance it is penetrating has always been out there.
Females who can produce but a limited number of offspring regardless of how many mates they have want to mate with the best available male.
However, the researchers were surprised to discover that just 24-hours later, the sea slugs had regenerated their male organs and were able to mate again.
Males, known as drones, perform no useful function except to mate.
The result is that males often compete with each other sometimes violently for access to females, but females then decide which males they wish to mate with.
Scientists, tourists, journalists, conservationists and the government of Ecuador all waited for two decades for him to mate successfully or, indeed, get it on at all.
The observation takes account of new research that shows hammerhead and great white sharks patrol fixed routes in the ocean, gathering at hotspots to mate or feed.
Known to mate for life, cranes are an ancient Chinese symbol of fidelity, a concept the artists here emphasized by including two tottering fledglings in each composition.
"At this point we can't be sure exactly how females are choosing to mate more 'intelligent' males, but there are two basic ways this could occur, " says Keagy.
The sterile flies (raised in special laboratories in Guatemala and rendered sterile with gamma rays) are expected to mate with females which, of course, will be unable to reproduce.
After blood passes into the mosquito gut, the parasites quickly turn into male and female forms the gametes and emerge from their hiding place inside the red blood cells to mate.
Their intelligence, in combination with their ability to mate year-round, is what has enabled wild pigs to evade capture and take over prairies, mountain valleys and rugged deserts from Canada to Mexico.
Lohi and his colleagues developed a genetic test for breeders to test their sires and dams for the mutation in order to ensure that two carriers aren't allowed to mate and have puppies.
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The pair will get the chance to meet up to three times for short 15 to 30-minute intervals, following the pattern of how pandas would come together in the wild to mate and then separate.
Theories abound that male self-sacrifice may be a logical extension of the practice employed by many animals, including insects and spiders, of the male bringing a gift of food to encourage the female to mate.
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The high incidence of promiscuity among females coupled with the fact that they increase their risk of predation, parasites and disease to mate with multiple males suggests that there must be a benefit to the behaviour.
Tian Tian and Yang Guang will be given the opportunity to meet up to three times for short 15 to 30 minute intervals, following the pattern of how pandas would come together briefly in the wild to mate.
Because flashy, dominant males tend to mate with disproportionately more females than dull, unassuming ones it makes sense to focus on bringing the best sons to the peak of perfection with a hormone injection that makes them look even flashier than their genes alone would allow.
The females are sitting on their perches with their fannies curled up in the air, letting the whole mantis world see their goods, while the males are usually hanging out just a few feet away from the females, collecting their guts and gear before they approach the females to mate.
"Bats use a lot of different types of sounds, from singing to each other to find a mate and to using echoes from their tweets to find their way around, " explained Kate Jones, joint University College of London (UCL) and Zoological Society of London (ZSL) chairwoman of ecology and biology.
Cheltenham have introduced the Best Mate Season Ticket to attract punters to racing during credit-crunch times, which allows entry in to the Best Mate Enclosure for all 17 Cheltenham race fixtures.
And although Schumacher has yet to comment on stories suggesting his move to Mercedes is a done deal, BBC Sport understands his return to F1 as team-mate to Nico Rosberg is looking increasingly likely to happen.
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He'd noticed that some personal items were missing and, even though he had no idea who was responsible, jailhouse rules dictated that he had to ask his bunk-mate to "strap up" - put his shoes on for a fight.
Keepers at Edinburgh Zoo as still waiting for female giant panda Tian Tian's hormone levels to peak before she can be introduced to her mate.
One can have a long, happy marriage without losing touch with reality, but it helps to be a bit starry eyed when it comes to you mate.
Aphrodite is a mage god that really shines in a lane with an allied god, able to link up with her soul mate to create a vicious duo.
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