Two mathematicians now say they’ve made progress on a very old unsolved math problem ... and unproven for at least 55 years. But they really date back 100 years, to when both men were in ...

PHILADELPHIA, Pa. — A pair of critically endangered, nearly 100-year-old Galapagos tortoises at the Philadelphia Zoo have become first-time parents. In a recent announcement, the zoo said it is ...

According to the zoo, the tortoise named Mommy is estimated to be around 100 years old. That makes her the oldest first-time mom of her species. So far, there are four hatchlings. The first one ...

According to the zoo, the tortoise named Mommy is estimated to be around 100 years old. That makes her the oldest first-time mom of her species. So far, there are four hatchlings. The first one ...