Smithsonian's National Zoo staff have brought 1-year-old female Lulu in as a companion for Thor and now hope kittens are in their future.
Some 48-million-years ago, a horse was about to give birth, but the tragedy that followed has been frozen in time.
Artificial light is causing some wallabies to delay when they give birth, putting them out of sync with the resources they need to feed their young.
After going nearly a decade without any male contact, a female yellow-bellied watersnake has given birth to offspring.
Poachers risk up to nine years in prison and a nearly $12,000 fine if caught grabbing eggs out of the sand nests.
Three critically endangered Javan rhino calves have been filmed in an Indonesian national park.
The bird's remains show evidence of forced feeding, pointing scientists toward the possibility it was being bred.
The zoo staff got a great glimpse of giant panda Mei Xiang's surviving cub when she left him briefly to relieve herself.
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