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.

Two glands increase steroid production after female California two-spot octopuses mate, a study finds. Those hormones may be responsible for the animals’ self-destructive behavior.

Researchers who study the phenomenon in humans should incorporate subjective experiences into data on love.

In Chapter 1, “Survival,” author Anna Machin describes the health benefits of strong human bonds.

The transcription factor can also drive the opposite transition depending on which hormone activates it, according to a new study.

Researchers studying rats claim to have found a novel connection between damage on one side of the brain and problems with the posture or movement of limbs on the opposite side of the body.

In her current work, the University of Southern California psychologist is examining how the transition to fatherhood affects men’s brains.

The University of Texas Southwestern professor’s research focused on the androgen hormones that cause male sexual differentiation and may also lead to prostate disease.

The hormone, which is well known for regulating appetite, appears to influence neuronal development—a finding that could shed light on disorders such as autism that involve dysfunctional synapse formation.

Corticosterone interferes with signaling in the skin that normally activates hair follicle stem cells, possibly explaining the link between stress and hair loss.

Changes in blood levels of oxytocin and adrenocorticotropic hormone and patterns of neural activity predict how much money people will donate to a cause with high accuracy.

A combination of factors, from oxytocin release as an indicator of emotional investment to cortisol and other hormones that correlate with attention, can forecast what people will do after an experience.

The University of Texas Southwestern scientist studied the roles of glucagon and insulin in regulating blood glucose, leading to several successful treatments.

Independently produced knockout mouse strains fail to find evidence of the bone protein’s endocrine functions, and divide researchers’ opinions.

The plant geneticist has revolutionized researchers’ understanding of how light affects plant growth and development, and is engineering plants to combat climate change.

The Rockefeller University neuroendocrinologist made landmark discoveries on how hormones affect brain structure.

A device that releases synthetic hormones slowly over time could one day provide a more practical alternative to daily birth control pills, say scientists.

From 1969 to 1988, 25,000 infants were born early each year as a result of hot weather, and with global warming pushing temperatures higher, more babies will be at risk for early birth.