Frequent use of high-strength cannabis may increase the risk of mental health problems, according to a large-scale epidemiological study.

While sugary beverages seem to be the worst offenders, artificially sweetened drinks might also be associated with health problems, an observational study suggests.

A study links having a male twin with women’s educational, financial, and childbearing decisions. Researchers suspect prenatal exposure to testosterone may play a role.

Genetic material from old artifacts can link people to their ancestral communities and potentially help descendants find their roots.

The former Columbia University professor’s early work helped illuminate the structure of penicillin, allowing chemists to make variants and broaden the scope of antibiotic treatments.

Exposing mice to an hour of 40-hertz stimuli every day for a week reduced levels of amyloid-β plaques and tau protein, and improved cognition.

Such differences may help explain accidental pregnancies among women on the pill, researchers say.

The publication of the SCIPIO trial is among many by Piero Anversa’s lab that Harvard Medical School flagged for fraudulent data.

The publisher failed to meet requests for better access to research, a consortium of Norwegian institutions says.