Pykrete William Lawrence Sr Omnibit 2-9-18

A plan to build an aircraft carrier out of ice and sawdust was seriously considered during World War II. The substance — pykrete — is as strong as concrete and has a slow melting rate. It can be repaired with seawater.

Pykrete William Lawrence Sr Omnibit 2-9-18

Pykrete William Lawrence Sr Omnibit 2-9-18

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