The box built for pairs

In 2018, researchers at the University of Seville and Lehigh University found a shape nobody had described before — one that let cells fit together perfectly even as the surface they sat on bent and stretched. They called it the scutoid. It wasn't designed. It was discovered, already at work, solving a packing problem nature had faced for millions of years — some scutoids, with the right regularity of sides, even tessellate, locking against themselves edge to edge without a gap. We saw the same shape as an opportunity: a box built specifically to hold a pair, with no wasted space and no compromise in the fold. That's the geometry we borrowed.