A team of neuroscientists at the RIKEN institute in Japan have created a liquid, primarily fashioned out of fructose sugar, that turns flesh transparent. This aqueous solution, called SeeDB, has been successfully used by the researchers to make mouse embryos and brains transparent without damaging any of the fine structures within the samples. The researchers were then able to visualize the entire neuronal circuitry of a mouse brain on a whole-brain scale, without having to first cut it into slices -- an important first for neuroscience.