A pair of calves was born about eight months ago in Tanzania’s Tarangire National Park.

A twin study suggests that the blood-sucking insects are more attracted to people with certain genes.

Twin study shows environmental factors play a greater role than genetic ones in shaping individual immunity.

Analyzing data from a large twin study, researchers have homed in on how host genetics can shape the gut microbiome.

More than school or family environment, a child’s genetics influences high school exam results.

Mice that explore more have higher levels of neurogenesis, suggesting a link between experience, brain plasticity, and the emergence of distinct personalities.

Genetic changes that may initiate childhood leukemia could originate while the baby is still in utero.

Random chance, plus small differences in uterine environments, give rise to divergent epigenetic patterns in identical twins.

Mothers more likely to have twins have heavier, healthier non-twin babies, possibly explaining why twinning evolved.