Retired Scottish nurse Joy Milne was asked to smell 12 shirts – half of which were from people with diagnosed Parkinson's. She stunned the scientists.

This essay is part of a series on environmental health. It was back in 1958 that a chemical company discovered that its new weed killer appeared toxic to humans, “mainly by affecting the central ...

Parkinson's disease causes both movement and cognitive deficits, and for a long time both were thought to be caused by the accumulation of a protein called alpha-synuclein in the brain. But a new ...