Experts have estimated that there are 29,000 objects 10 cm or larger orbiting Earth. Only 7 percent are working satellites. The European Space Agency is looking at ways to mitigate the threat.
ansparent, 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.
