17x -

Scientists looked at nacre (mother-of-pearl), the inner layer of oyster shells, which is incredibly resistant to cracking despite being made of brittle minerals.

Perhaps the most significant recent use of "17x" is in the field of sustainable construction. Researchers at have developed a bio-inspired cement paste that is approximately 17 times tougher than standard cement. Scientists looked at nacre (mother-of-pearl)

The designation "17X" also holds weight within specialized military career fields and aircraft development. the inner layer of oyster shells

Boeing once proposed the BC-17X , a commercial version of the C-17 Globemaster III. Designed to deliver outsized cargo to remote, unpaved airfields, it was intended to earn money commercially while being available to the military as needed. Scientists looked at nacre (mother-of-pearl)