This is a beautiful image of human brain cells, which can now be grown from adult skin cells.

Yichen Shi:
"Brain neural stem cells derived from human skin cells: these stem cells express typical marker genes of brain neocortical stem cells, such as Pax6 (Red fluorescent labeled), and form a rosette structure resembling the transection of the neural tube."

The entire image is about 250 μm across (a really thick bit of human hair).

More info:
http://www.cam.ac.uk/research/news/brain-cells-created-from-patients-skin-cells

Picture taken by Yichen Shi in the Livesey Lab
http://www.gurdon.cam.ac.uk/~liveseylab/fjlhome/index.html

Voice over by Fred Lewsey.

Music by Peter Nickalls: http://www.peternickalls.com