A human embryonic stem cell printed on a home-made 3D printer. Using stem cells as a form of 'ink', the Heriot-Watt University team, led by Dr Will Shu, think they'll soon be able to print human tissue. Bioengineer Alan Faulkner-Jones built the printer which uses a valve-based technique to deposit whole, live cells onto a surface.

Business: "Future Organ Production a Possibility with 3D Stem Cell Printer"