There is growing evidence that Parkinson’s disease (PD) affects women and men differently. In a new review[1] scientists present the most recent knowledge about these sex-related differences and highlight the significance of estrogens, which play an important role in the sex differences in PD. “It is becoming increasingly evident that PD differs in women and… Read more

The “fight or flight” response, is commonly believed to be triggered in part by the hormone adrenaline. But a new study[1] from researchers at Columbia University suggests that bony vertebrates are not able to produce this response to danger without the skeleton. The researchers found in mice and humans that almost immediately after the brain… Read more

The hormone ghrelin makes us more susceptible to appealing food smells, a phenomenon that encourages overeating and obesity, according to new research. Earlier work by Alain Dagher’s lab at the Montreal Neurological Institute and Hospital of McGill University and colleagues demonstrated that ghrelin encourages eating and the production of dopamine, a neurotransmitter that is important… Read more

Biologists have grown human retina tissue from scratch to learn how the cells that let us see in color are made. The work may lay the groundwork for therapies for eye diseases such as color blindness and macular degeneration. It also establishes lab-created organoids — artificially grown organ tissue — as a model to study human… Read more

Fathers whose cortisol levels were elevated while they held their newborns on the day of their birth — either skin-to-skin or clothed — were more likely to be involved with indirect care and play with their infants in the first months of their lives, a new study indicates. In a first-of-its-kind study, University of Notre… Read more