Biologists like to say that reproduction is the ultimate investment, a costly gamble that shapes everything from lifespan to ...

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 ...

Fishermen at a national park in Thailand were stunned when a massive sea creature approached their boat. A video shows the a rare sighting. Screengrab from Thailand’s Department of National Parks, ...