The brain of an alzheimer's victim displays plaques, which are and tangles, which are

Scientists can also glimpse the awful effects of Alzheimer's disease when they look at brain tissue beneath the microscope:

Alzheimer's tissue has numerous fewer nerve cells and synapses than a well brain.

Scientists are not absolutely sure what causes cell death and tissue deficiency in the Alzheimer's brain, but plaques and tangles are key suspects.

the electromagnetic energy from the sun arrives in the form of visible and invisible light.