Neuroscientist Alipasha Vaziri of the University of Vienna and his colleagues have for the first time imaged all of the neurons firing in a living organism, the nematode worm Caenorhabditis elegans. They engineered C. elegans so that when a neuron fires and calcium ions pass through its cell membranes, the neuron lights up. To capture those signals, they imaged the whole worm using a technique called light-field deconvolution microscopy.
Read more in Nature.