Tiny particles breathed in and taken into the brain through air pollution could be linked to diseases such as Alzheimer's, research has found.

Experts have discovered the presence of magnetic nanoparticles, which have previously been associated with the development of neurodegenerative diseases, such as Alzheimer’s, in the human brain. But, according to researchers from the UK and Mexico, the shape and features of the nanoparticles suggest they are less likely to have been…