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 ...

Great white sharks have a bad reputation. They are large and aggressive sharks that can grow up to 20 feet long and can live 40 to 70 years. Despite their size, reputation, and popularity in media, ...

1. Introducing sharks, skates, rays, and chimaeras -- What are sharks and how are they classified -- How many kinds of sharks are there -- How did sharks get their name -- Where do shards live -- When ...