This story appears in the March 2018 issue of National Geographic ... 3-D printers to make living body parts. Called bioprinters, these machines use human cells as “ink.” ...

This story appears in the September 2017 issue of National Geographic magazine ... doesn’t let cells behave as if they are in the human body. Cilia inside the lung-chip. Microscope image ...

This story appears in the June 2017 issue of National Geographic magazine ... that transforms images into 3-D models of the human body’s bones and organs and enables students to explore their ...

No such obstacle faced Woo-Suk Hwang and his colleagues at Seoul National University in February 2004 when they became the world's first to clone human embryos and extract stem cells from them.