NPR offers a correction to a piece earlier in the week in which we referred to the mollusk in the famous "Birth of Venus" painting by Botticelli as a clam shell.

It's possible that a clam shell scratched by Homo erectus — an early hominid — might be our oldest-ever example of artistic work. Or just a thoughtless doodle. The shell, which was found in ...

For centuries Native Americans treasured quahog shells, the purplish hard coverings of clams found along North Atlantic shores, which they fashioned into beads called wampum to adorn ceremonial ...