During the COVID-19 pandemic, wealthier people had the money to stay home and order online. Not so for poor people, who instead made more trips to local dollar stores and small groceries to get their family's food.

Why is that bad? It isn't at face value, supporting local businesses is an aspirational claim for many, but a group of academics claim that without equal incomes and equal access to buying in bulk, poor people were worse off when it comes to making healthy food choices. That is like arguing muffin in a local bodega is bad while a muffin in a Whole Foods is good, when experts know the Whole Foods version has far more calories. 

An unknown methane-producing process is likely at work in the hidden ocean beneath the icy shell of Saturn's moon Enceladus, suggests a new study published in Nature Astronomy by scientists at the University of Arizona and Paris Sciences&Lettres University.

In an observational study using data from the Veterans Health Administration for 2,344 U.S. veterans hospitalized with COVID-19, remdesivir treatment was associated with prolonged hospitalization but wasn't associated with improved survival. 

Adolescent girls and young women can and will use HIV prevention products with consistency, according to interim results of a study of two different methods: daily use of the antiretroviral (ARV) tablet Truvada® as oral pre-exposure prophylaxis (PrEP) and the monthly dapivirine vaginal ring, a new HIV prevention product currently under regulatory review in several countries.

To provide protection against HIV, both must be used consistently- daily, for oral PrEP, and for the ring, a full month at a time - which previous studies of these products found to be especially challenging for younger women.

There is a belief that Airbnb listings cause increased crime in residential neighborhoods - or at least annoying late-night parties which increase risk of crimes. However, a new paper suggests that while Airbnb listings can be linked to a reduction in the local social dynamics that prevent crime, it isn't the tourists committing the crimes. And it takes years, which means Airbnb listings may be a symptom rather than the cause.

A new paper has statistically linked inflammatory bowel disease, an umbrella term for chronic inflammation of the digestive tract, to processed foods. But because every food is processed - no one eats wheat that hasn't been milled - the term has now become "ultra-processed."