How did those shells get those holes in them? And what's a mermaid's purse? A guide to almost every shell you'll find at the Jersey Shore.

Six-year-old Luke Callihan, of Pennington, collects shells on the beach in Brigantine, Sunday, July 2, 2017. (Lori M. Nichols | NJ Advance Media for NJ.com) This story was originally published ...

More than half a billion years ago, mystery predators bored into shelled animals' defensive casings. Some of the holey shells ...

Fossil records of the holes drilled in clam shells before and after a mass extinction two million years ago show patterns of predator-prey behavior indicating that although diversity recovered ...

Researchers have found that over the last 120 years, the porosity -- or small-scale holes -- in mussel shells along the East Coast of the United States has increased, potentially due to warming ...

For her study, Melbourne looked at shells collected in the early 1900s and the 1960s from five sites: Nahant Bay in Massachusetts, the southern end of Cape Cod, the tip of the Long Island Sound ...

You can also look for holes during this same time, Cicada Mania said. Cicada holes are about the size of a dime. But just because you see the hole, doesn't mean it's time.

Tiny holes in three fossil clams reveal that by 75 million years ago, ancient octopuses were deviously drilling into their prey.The find pushes evidence of this behavior back 25 million years ...

The cockle shells gathered in Neanderthal times were discovered fused into the maw of a sea cave overlooking Spain’s Cartagena Harbor. Several other shells found in the cave from the same era had been ...

Remnant shells still held their original shape, but were full of holes. Once the blanks were ready, finishers would polish the discs and use a machine to create grooves and drill the holes for thread.