Scientists have come up with a way to make whole brains transparent, so they can be labelled with molecular markers and imaged using a light microscope. The technique, called CLARITY, enabled its creators to produce the detailed 3D visualisations you see in this video. It works in mouse brains and human brains; here the team use it to look into the brain of a 7-year-old boy who had autism. Orig
![See-through brain - YouTube](https://cdn-ak-scissors.b.st-hatena.com/image/square/096f0b236844c2305788b7e6e043fc96851bc9e0/height=288;version=1;width=512/https%3A%2F%2Fi.ytimg.com%2Fvi%2Fc-NMfp13Uug%2Fhqdefault.jpg)