More than 113 years after the Titanic sank in April 1912, the idea of an unsinkable ship still captures engineers’ imagination. Now, researchers in the US say they have taken a practical step toward that goal.

Recently, a team at the University of Rochester reported a new method that allows ordinary aluminum tubes to float indefinitely, even after being heavily damaged and submerged for long periods.

 The researchers say their approach could eventually support new designs for ships, buoys, floating platforms, and even renewable energy systems.

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