One of the year's most popular posts examined the evolutionary pull of running and high-aerobic activities on our brains. Above, a man runs past the Sydney Harbour Bridge in April.
Ryan Pierse/Getty Images
Brain scans using Amyvid dye to highlight beta-amyloid plaques in the brain. Clockwise from top left: a cognitively normal subject; an amyloid-positive patient with Alzheimer's disease; a patient with mild cognitive impairment who progressed to dementia during a study; and a patient with mild cognitive impairment.
Slide courtesy of the journal Neurology
Doctors used a type of MRI test to look at the blood vessels in the brain of a woman with dystextia. The test confirmed she was suffering from a stroke on the right side of her brain
Archives of Neurology
Photographer David Blackwell and his wife prepared for the apocalypse. Cats and cat food? Check. Toilet paper? Check. Exploding volcanoes and hurtling asteroids? Not so much.