Dr Schwartz and his team coaxed embryonic stem cells to become retinal pigment epithelium tissue which supports the rod and cone cells that actually respond to light
The whole darkening room depressed her and, going to the window, she raised the sash, unlatched the shutters and let the last light of the wintry sunset into the room.
The passports of many countries contain images of their well-known geographical features and wildlife, which also function as security features, as some are only visible under a special light.