This sperm may have come in like a lamb — but it’s out like a lion. A highly fertile one. Semen stored in an Australian lab since 1968 has been defrosted and used to impregnate 34 Merino ewes, ...

Scientists have returned from China with something they hope will help the breeding chances of a female giant panda at the National Zoo: frozen semen. Zoo officials hope to use the sperm, from the ...

There are a lot of things you can't bring on an airplane -- explosives, fireworks and hazardous chemicals, to name a few. Frozen bee sperm, however, is not one of those things. It's a good thing too, ...

Black-footed ferrets, a critically endangered species native to North America, have renewed hope for future survival thanks to successful efforts by a coalition of conservationists, to reproduce ...

JUNDIAI, Brazil — Brazilian and American scientists on Thursday tranquilized a wild-born female jaguar now living in a protected area in Sao Paulo state. They’re hoping the 110-pound feline named ...

Scientists in Australia have set a new record by using the world’s oldest known viable semen to impregnate dozens of merino sheep. The sperm had been frozen since 1968, but the live birth rate was as ...

Semen stored since 1968 in a laboratory in Sydney has been defrosted and successfully used to impregnate 34 Merino ewes, with the resulting live birth rate as high sperm frozen for just 12 months.