A painting of a woman using the light of a torch

A painting of a woman using the light of a torch

A painting of a woman using the light of a torch to reveal two signs reading "Endoderm" and "Mesoderm". A city is in the background, and swirls of color represent the night sky.

Researchers revealed how to convert stem cells to more mature cell types using small molecules instead of expensive growth factors and reported their results in a paper published today (Aug. 26). Yuqian Jiang, first author on the paper, illustrated finding the path.

IMAGE: Yuqian Jiang/Penn State