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The antidepressant properties of hallucinogenic drugs may stem from their ability to bind to intracellular serotonin receptors, a study suggests.

Researchers dissect the Neanderthal-derived region on chromosome 3 that drives severe COVID-19 to zero in on the key causal variants.

Synthetic variations of squalene, which is used to boost immune responses, could make vaccines more effective while reducing fisheries for struggling sharks.

Males recovered from mild COVID-19 have baseline immune states primed to mount stronger responses to future challenges.

Levels of health-promoting gut bacteria are linked with severity of fatigue symptoms, a study finds.

Syphilis is among the oldest known sexually-transmitted infections. Scientists still struggle to detect and treat it.

An engineered methylation pattern persisted for four generations of mice, demonstrating transgenerational epigenetic inheritance can occur in mammals.

Multiple candidates are in Phase 3 clinical trials for older adults and pregnant women, with some getting close to approval in the United States.

The “on demand” drug immobilizes sperm rather than limit their production, preventing 100 percent of pregnancies in an experiment.

Two studies find that tumor-specific antigens are often peptides that result from a splicing event between exons and transposable elements.

Researchers identify hundreds of candidate histone proteins in bacteria, including one with an unusual way of binding to DNA.

A study employing CRISPR/Cas9 to explore the evolutionary beginnings of some giant viruses finds evidence their large genomes arose from gene duplications.