It sounds impossible, but it’s real—a shark born without fertilization. Discover how this “miracle birth” could reshape marine science.

In an unprecedented effort, 15 aquariums from around the world are teaming up to raise endangered baby zebra sharks and reintroduce them into the wild, where populations have nearly gone extinct.

Maybe you've seen a "mermaid's purse" while walking on the beach. Not actually an accessory for the mythical creature, these small casings are the eggs of sharks and their relatives. For around 455 ...