In brief: they've grown thicker shells. The paper documents ... underscores the possibilities of long-running longitudinal ...

Their shell has been reduced so much through evolution that in ... You often find snails clumped together in this state. Snails don’t live very long. Most snail species only live for one to two years.

After a long and tedious Voyage ... research zoologist Jerry Harasewych was cutting open a small land snail shell from the Bahamas. For scientific purposes, the museum preserves shells in ...