At about 2 centimeters in length, Thiomargarita magnifica tests scientists’ notions of how large microbes can grow.

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.

A previously overlooked protein is important to this type of itch, an insight that could aid the development of new treatments.

A study finds that injuries to certain areas of the brain were associated with quitting smoking more quickly, easily, and with no cravings.

Experiments in animals and observations in humans suggest that the amount of proline circulating in one’s plasma has a strong association with depression severity.

The country’s provisional go-ahead could increase pressure already being exerted on the US Food and Drug Administration to approve the therapy.

Compared with cells taken from non-autistic controls, neural precursors from autistic boys proliferated in atypical ways, a small study finds.

Testing in animals and lab-grown cells suggests the experimental drug could enhance the function of lysosomes within cells.

Microbes in the gut influence the death of support cells in the brain by producing isoamylamine, a study suggests.

When unexpected events occur, norepinephrine signals mouse brains to pay attention to key details.

The fish species is separated from mammals by hundreds of millions of years of evolution, yet its seemingly primitive brain can handle many of the same elaborate visual tasks.

And how do scientists go about answering that question?