By GERALD IMRAY

CAPE TOWN, South Africa (AP) — For 35 years, American zoologist Laurie Marker has been collecting and storing specimens in a cheetah sperm bank in Namibia, hoping conservationists never have to use them.

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But she worries that the world’s fastest land animal might be on the brink of extinction one day and need artificial reproduction to save it.

Marker says the sperm bank at the Cheetah Conservation Fund she founded in the southern African nation is a “frozen zoo” of cheetahs she’s been building since 1990. It would be utilized in a worst-case scenario for the big cats, whose numbers have dropped alarmingly in the wild over the last 50 years.

“You don’t do anything with it unless until it’s needed,” Marker, one of the foremost experts on cheetahs, told T

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