This year’s most beautiful illustrations covered topics including the molecular underpinnings of Parkinson’s disease and strategies for tracking marine organisms around the world’s oceans.

A look at some of the circulating molecules that may indicate various Alzheimer’s pathologies and serve as the bases of noninvasive tests for the disease.

Researchers hope circulating biomarkers will enable earlier detection and better monitoring of the neurodegenerative disorder—and perhaps help usher in new treatments.

Oligomannate, derived from a compound in seaweed, suppresses neural inflammation caused by gut bacteria in mice.

New methods of visualizing tissue are presented at the Society for Neuroscience meeting.

In brain samples from people with Alzheimer’s disease, the protein aggregates more strongly bound proteins involved in processing RNA, the same study finds.

New evidence points to a waste-clearing problem in patients’ cells, rather than the accumulation of protein tangles, as the root cause of the neurodegenerative disease.

Evidence is accumulating that breathing contaminated air might impair cognition.

Contaminants in the atmosphere appear to have harmful effects on neurodevelopment and cognitive function.