Probably rats. They like to eat snails and tend to hang out in a favorite spot to enjoy them. I’ve also found piles of snail ...

Q. I was cleaning out my shed and found a big pile of empty snail shells in the corner. No snails or shells anywhere else — just in that corner. What gives? Probably rats. They like to eat ...

In brief: they've grown thicker shells. The paper documents two sets of field experiments, conducted 20 years apart, measuring the thickness and plasticity in samples of tidal snails. The first ...