Stories by Carrie Arnold

Viruses exist as “mutant clouds” of closely related individuals, an insight that is helping researchers predict where disease is likely to spread

Vaccines against cocaine, heroin and other substances may one day help addicts stay clean

It’s dangerous. Really

A new theory proposes methane-spurting single-celled organisms were behind the Permian extinctions

Researchers are unlocking the secrets of how fish swim in coordinated schools

Forensic epidemiologists are tracking rapid viral mutations to help convict criminal spreaders of disease

Your online persona and possessions can help assuage grief over your passing

The universal desire to squeeze baby animals, hard

China's one-child policy has affected the personalities of a generation of only children

New studies show how maggots clean wounds and help them heal

Eating together might not be as magical as researchers thought

How your grandpa's rough life might make you more anxious

Mentally reframing a situation can ease negative feelings

A cascade of misfolded proteins may trigger Alzheimer's

False information is pervasive and difficult to eradicate, but scientists are developing new strategies such as "de-biasing," a method that focuses on facts, to help spread the truth

Brain regions may communicate excessively in depression

Bacteria-eating viruses may power cell phones

Trouble with focus and memory lapses are not just in a woman's head

A little-known sense that monitors how we feel inside can go awry, potentially distorting body image

The bacteria that live quietly in our bodies may have a hand in shaping evolution

A stutter indicates a massive change in brain wiring that affects more than just speech

The perceptual illusion may reflect difficulties integrating sensory information

A new study finds that separate sets of genes control bodily and reproductive aging processes