یک صدف غول پیکر حاوی یک دفتر خاطرات ماه به ماه از آب و هوای دیواره مرجانی بزرگ در 200 سال پیش است.

One giant clam contains a month‑by‑month diary of the Great Barrier Reef's climate 200 years ago

When you swim through the azure waters of the Great Barrier Reef, there is one creature on the seafloor that's almost impossible to miss: the giant clam. Its huge, fluted shell frames a soft mantle shimmering with electric blue, green and gold.