Mr Shribman: Yeah, so one of the systems in the human body is the digestive system. Ours is simpler than some other animals', like cows and deer have multiple stomachs, we just have the one.
A research group at University of Tsukuba has discovered that the entrance to the gut (pylorus) and the exit (anus) of sea urchin larvae open in response to light, each to different wavelengths. This ...