It took nearly 100 years for a duo of endangered Philadelphia Zoo tortoises to become parents -- the time to name those hatchlings will be much, much shorter.

It is hard to tell the girls apart, so zookeepers put a little dot of different color nail polish on each of them.

Four adorable western Santa Cruz Galápagos tortoise babies are now on display at Philadelphia Zoo after their 100-year-old 'Mommy' reproduced for the first time.

Four adorable western Santa Cruz Galápagos tortoise babies are now on display at Philadelphia Zoo after their 100-year-old 'Mommy' reproduced for the first time.

The Philadelphia Zoo’s newest residents are officially accepting visitors. The zoo on Wednesday debuted its four female ...

As of April 3, the zoo reports four tortoise hatchlings and has a team monitoring the remaining 12 unhatched eggs. This is the first Galapagos tortoise hatching in Philadelphia Zoo history.

The successful hatching of these eggs, with a balanced gender ratio, offers renewed hope for the survival of Galápagos tortoises. Mommy's historic first egg laying at the Philadelphia Zoo Mommy ...

Female tortoises typically lay up to 20 billiard-ball-sized eggs at a time, according to the Philadelphia Zoo. The temperature during incubation determines the hatchlings' sex — eggs incubated ...

Female tortoises typically lay up to 20 billiard-ball-sized eggs at a time, according to the Philadelphia Zoo. The temperature during incubation determines the hatchlings' sex — eggs incubated at 82.4 ...