At Caldwell Zoo, vital cheetah conservation work unfolds in a dedicated breeding center.

CAPE TOWN, South Africa — 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.

Researchers thought that just one subspecies of cheetah lived in Saudi Arabia long ago. But an unexpected discovery seems to ...

Although the federal government was partially closed last month, a creature in its custody, apparently unaware of any restrictions, produced a litter of four little ones in a breeding milestone.