Massive mounds of conch shells have been towering near Anegada in the British Virgin Islands for hundreds of years.

For those who have never prepared conch — the giant sea snail with a spiral shell that doubles as a trumpet — Compton likes ...

They were once even bigger: Historic Florida photographs show tourists lugging horse conch shells half the length of a small child. Those sizes aren’t seen anymore, prompting researchers to ask why.

as small as one micron or one thousandth of a millimeter thick. The Queen conch shell, Ballarini explained, contains many cracks along the interfaces of its crossed lamellar structure that ...