Brown amyloid beta plaques are visible in the slide on the left, which contains a tissue sample of an untreated brain with Alzheimer's Disease. There are no plaques in the tissue sample on the ...

The tiny piece of tissue contained 3.4 ... took that same cubic millimeter of brain and sliced it into more than 28,000 layers, each 1/400 the width of a human hair, and took images of each ...