More than a century after its discovery, Alzheimer's disease is still destroying people's brains.

VOA: special.2009.09.15

Researchers discovered that people whose brains have higher levels of leptin are less likely to suffer from Alzheimer's or other forms of dementia.

VOA: standard.2009.12.30

"All our brains shrink a little as we grow older, but in some people it shrinks more and some it shrinks less,"

VOA: standard.2009.12.30