For the first time, a team of researchers have filmed a complete central nervous system firing as a more complex animal--in this case, a fruit fly larva--moved back and forth.

The central nervous system is responsible for controlling the body’s movements, but it has been understandably hard for scientists to see the network in action until now. 
For the first time, a research team has been able to visually capture a more complex animal’s neural activity as it moves. 
They were able to watch the inner workings of a fruit fly larva by shining lasers on both sides of its body, a process called light-sheet microscopy. The method also