Researchers identify neurological pathways through which light affects mood and learning in mice.

Pectin fragments may signal plant cells to maintain a type of growth suited to darkness.

Scientists infuse plants with the luminescence of fireflies. 

Genetically engineered "disco bacteria" sense and respond to different colors of light, creating both stunning art in the culture dish and new possibilities for synthetic biology.

Incorporating light-controlled dimerization domains into kinases provides tight regulation of these enzymes.

Photon emissions in the brain are red-shifted in more-intelligent species, though scientists dispute what that means.

Squid, cuttlefish, and octopuses possess vision machinery in their skin.

Artificially extended days cause mice to gain fat and alter the function of their brown fat, a study shows.

The mollusk’s flashy tactics scare off predators.