The baby animals, born at Animal Kingdom, ... a Tuesday announcement the monkeys were born at just about 4 inches long and weigh "about as much as a common chicken egg." ...

Although these animals produce eggs, they don’t lay them. Instead, the young hatch while still inside the female’s body and are born as miniature adults. This is known as ovoviviparity. In 1996, a ...

Animals, from worms and sponges to jellyfish and whales, contain anywhere from a few thousand to tens of trillions of nearly ...

In the world of eggs, apart from the few roosters kept for breeding, males are superfluous, with hens producing 1.5 trillion unfertilised eggs per year without them.

Though born from the same litter, these kittens all have different sets of genes. bozhdb/iStock via Getty Images Biologists believe that identical twins in most animals are very rare.

Here’s how a virgin birth happens: As an egg cell matures in its mother’s body, ... But the increasing ease of DNA analysis, which makes animals born this way easier to identify, ...

Twin cotton-top tamarin monkeys were recently born at Florida’s Walt Disney World, marking the first time in more than two decades the critically endangered species has been born at the park.