The brain's lymphatic clearance system, discovered in 2012, was initially met with disbelief by the scientific community, with one scientist being told she was wrong about her earlier findings.

“Up until 2012, no scientist, no physician believed that there was a lymphatic system for the brain, that lymphatic clearance, or flow, or any of that occurred in the brain. It was assumed that it was not, because it had not been discovered, except there was one scientist who had discovered it earlier and was told that she was wrong about it.”