Brigham and Women’s study suggests daily use of a toothbrush lowers risk of hospital-acquired pneumonia, intensive-care mortality.

Observations in mice hint at the role of daydreams in remodeling the brain.

Harvard team's work is part of a national neuroscience study seeking to revolutionize understanding of the human brain.

Early stage test shows promise, but cardiologist notes more study needed into longer-term, unintended effects.

Key step toward reliable, game-changing quantum computing.

Dana-Farber Cancer Institute researcher details promise, peril of CAR T-cell therapy, which enlists body’s immune system to fight disease.

Researchers develop 12-step list to gauge how modifiable behaviors — physical, lifestyle, and social — affect stroke, dementia risk.

Professor Francesca Dominici details decades-old Harvard roots of latest findings showing particles from coal-fired power plants deadliest.