3D gel stacks can grow enough stem cells to treat brain disease

The gels help the stem cells remodel their environment and stay in contact with each other, which is key to preserving “stemness” — that is, the ready-to-program state — in the third dimension. The result is a culture that takes up just 16 square inches of space versus the 16 square feet required for a conventional 2D approach. It uses fewer nutrients and less energy, too, and the entire stack