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How well do you know your own brain? Explore the human brain by taking part in our eight mind-stretching debates. For each question, you can view the evidence, cast your vote and see how others voted

It's an inconvenient truth of aging: In our 30s and up, it gets increasingly harder for most of us to recall names, faces, and details from the past. Scientists have long debated whether this gradual decline is an early form of Alzheimer's disease-a neurodegenerative condition that leads to severe dementia-or a distinct neurological process. Now, researchers have found a protein that distinguishes typical forgetfulness from Alzheimer's and could lead to potential treatments for age-related memory loss.

AA and rehab culture have shockingly low success rates, and made it impossible to have real debate about addiction