A virgin birth? Here's how a female shark recently had three offspring without the help of a male http://cnn.it/2fkgO4e | CNN

While the majority of sharks give birth to live young, a number of species are oviparous, meaning they lay eggs. The eggs are laid in protective cases called mermaids’ purses. When sharks at the aquarium lay eggs, our keepers check on their development using a technique called candling, where they shine a bright light through the egg to monitor the embryo’s development. The egg cases shown in the video are chain catsharks and they were approximately four months into their eight and a half month