PLAQUE BUSTER In a trial of 165 people, brain scans showed reductions in amyloid-beta plaques (red) in people given the antibody aducanumab compared with a placebo. Higher doses caused more amyloid reduction.
J. Sevigny et al/Nature 2016
BLOOD FLOW The internal carotid arteries pass into the skull through two tiny holes (shown with arrows on this human skull). Scientists measured these openings in hominid fossils to estimate changes in blood flow rates to the brain across human evolution.
GOOD DOGS To see how dogs process speech, these pooches were trained to undergo MRI brain scans. The results: Dogs are a lot like humans.