Pet dogs produce a larger volume of tears when they are reunited with their owners than with acquaintances, possibly because of surging oxytocin levels—findings that could be the first evidence of emotional crying in nonhuman animals.
Pairs of same-sex friends who reported strong connections when they first met had similar body odors, and body odor similarity predicted whether two strangers would hit it off.
Health data from 5,744 adults over the age of 50 reveals an association between stressors such as discrimination and a relatively small proportion of younger infection-fighting immune cells.
In both a mouse model and the hospital records of more than 3 million children, researchers found a connection between strong immune activation in males and later symptoms of autism spectrum disorder.
A group of self-styled screamologists are sifting through the noisiness of nonverbal human vocalizations and finding previously undemonstrated forms of communication.
A 12-year study shows variation among primate groups in how the animals clasp hands during grooming, but consistency within them, even as group membership shifts over time.
