These human embryo-like structures (top) were synthesized from human stem cells; they’ve been stained to illustrate different cell types. Images (bottom) of the “embryoids” in the new device that was invented to make them.

These human embryo-like structures (top) were synthesized from human stem cells; they’ve been stained to illustrate different cell types. Images (bottom) of the “embryoids” in the new device that was invented to make them.