Meet some of the people featured in the September 2019 issue of The Scientist.

The author of a new book about emerging concepts in human genetics considers the question.

The largest study of its kind to date estimates that genetics accounts for at most 8–25 percent of variation in whether or not a person reports engaging in non-heterosexual behaviors.

Some researchers and animal rights groups are amplifying their opposition to an assay that measures how long a rodent tries to stay afloat.

Two research groups demonstrate that in Caenorhabditis elegans, behavioral traits can be passed down through the germline to future generations, even though they aren’t hard-wired.

Two clinical trials that altered vasopressin signaling report improved social functions in people with autism spectrum disorder, but researchers caution against overinterpreting the results.

For primates, males’ fancier ornaments are linked with smaller testes, according to a new comparative study.

The familiar word elicits a twitch of the ears or swish of the tail, suggesting felines can distinguish their names from other words.

Researchers have recorded tens of thousands of brain cells in mice as the animals transitioned from feeling thirsty to quenched.