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

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.

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 ...

With that said, be on the lookout for rat holes that are about 2.5 to 3.5-inches wide, and have smooth walls from frequent use. Typically, rat holes can be found in sheltered places with easy ...

If holes are in a random pattern, and these usually are the smaller holes, an insect of some sort is likely to be to blame. If you have random ragged holes, it could be a woodpecker after insects in ...

Smaller holes can be stuffed with steel wool. Inspect your attic vents and cover with ½ or ¼ inch hardware cloth. Keep tree limbs away from the house to deny easy access to the attic and roof.