The purplish shells of quahogs, treasured in the past by Native Americans, now appear alongside gold, mother-of-pearl and onyx. By Jill Newman For centuries Native Americans treasured quahog shells, ...

Quahog clams provide evidence that critical North Atlantic Ocean currents may be approaching a “tipping point,” researchers said. Mehdi Benkaci Unsplash Just as tree rings can tell us how old a tree ...