Salmonella: Why it’s a chicken and egg thing

Eliminating this food-poisoning bacterium from poultry is tricky — not least because rapid, precise tests are still unavailable. Researchers are looking at vaccines, probiotics, prebiotics and even essential oils as ways to reduce contamination on the farm.

Maureen O'Hagan • knowable
Sept. 10, 2021 ~14 min

Why don’t kids tend to get as sick from Covid-19?

Some children have been hospitalized and some have died, but at a tiny fraction of the adult rate. As children head back to school, scientists are hoping that research will provide answers.

Sara Reardon • knowable
Sept. 2, 2021 ~15 min

Tackling the growing problem of overmedication

Polypharmacy — taking five or more meds at a time — leads to side effects, unnecessary hospitalizations and premature deaths. Researchers and pharmacists are seeking solutions to this serious public health problem that disproportionately affects older adults.

Helen Santoro • knowable
Aug. 12, 2021 ~17 min

Studying poverty through a child’s eyes

Research on early-life adversity should pay more attention to the perspective of children themselves

Alla Katsnelson • knowable
Aug. 4, 2021 ~14 min

Building an immune system for the planet could prevent the next pandemic

OPINION: We need a global information network that spans borders so we can spot — and stop — new pathogens before they threaten world health

David Bray • knowable
Aug. 3, 2021 ~8 min

Foods of abuse? Nutritionists consider food addiction

Cookies, chips, hot dogs and other ultraprocessed fare raise risk of runaway eating

Tom Siegfried • knowable
July 28, 2021 ~11 min

The great sleep divide

Sleep deficits are robbing poor people and racial minorities of health and earning power. What can be done?

Katherine Ellison • knowable
June 22, 2021 ~12 min

Ah, wilderness! Is nature the tonic we’ve needed for pandemic malaise?

As Covid-19 descended across the world, people sought refuge in gardens, parks and the woods. But it’s hard to measure how being in nature affects our well-being — and how we can best reap its rewards.

Chris Baraniuk • knowable
April 21, 2021 ~17 min

Know thine enemy: Why genetic sequencing is key to tracking Covid-19

The US effort to analyze viral genomes, slow to start, is now picking up speed

Amber Dance • knowable
April 9, 2021 ~13 min

Yes, all this screen time is hurting your eyes

OPINION: A neuroscientist says that he’s particularly worried about kids, who may have spent much of last year learning online. Some easy hacks can help.

Zhong-Lin Lu • knowable
April 9, 2021 ~6 min