SIPAYIK, Maine—Clams have been entwined with the story of the Passamaquoddy tribe for 13,000 years. Archaeological digs at ancient tribal sites have uncovered “middens,” or piles of discarded ...

Healthy corals are colorful and full of life. And under normal conditions, corals and algae depend on one another. The corals offer the algae protection and the photosynthesizing algae provide the ...