Three million rivets held the Titanic together. Some of them may have helped sink it. 🚢

Divers' recovered rivets showed slag, glassy streaks that make iron brittle, in the hand-driven iron rivets at the bow and stern. When the hull opened, the seams parted.

Were the rivets alone to blame? No. Speed, steel and the iceberg all played a part. But a ship is only as strong as the smallest thing holding it together.

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