A mystery: Why are sharks suddenly snatching so many fish from anglers?

Sharks seem to be attacking fish on anglers’ lines more and more in. One scientist is out to figure out why, and how to stop ...
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Do sharks lay eggs? Here's how the fish gives birth and what some eggs look like.

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 ...