Cooling green roofs seemed like an impossible dream for Brazil's favelas. Not true! Temps soar in Brazil's summer (from December to March). Low-income favelas would benefit from green roofs but there are two problems: Cost. And a typical design that's too heavy for a favela home. Jill Langlois
U.S. puts virtually all foreign aid on 90-day hold, issues 'stop-work' order Following Trump's Monday freeze on foreign aid, a subsequent memo calls for for a stop-work order for current grants and contracts. Fatma Tanis
'Ugh. Do I have to?' Honest questions (and answers!) about cardio, illustrated If you're in the camp of folks who are dragging their feet to start working out again, this comic is for you. Malaka Gharib
Purdue Pharma and owners to pay $7.4 billion in settlement of lawsuits over OxyContin Members of the family who own OxyContin maker Purdue Pharma, and the company itself, agreed to pay up to $7.4 billion in a new settlement to lawsuits over the toll of the prescription painkiller. The Associated Press
Adults with ADHD live shorter lives than those without a diagnosis, a new study finds A large study of 30,000 adults diagnosed with ADHD in the U.K. found women with ADHD died roughly nine years younger than women without a diagnosis. Men had about a seven-year shorter lifespan. Maria Godoy
National Institutes of Health cancel scientific meetings after Trump directives An email obtained by NPR says NIH employees are subject to a travel freeze and offers of employment are being rescinded. Scientists worry about disruptions to critical research. Selena Simmons-Duffin
Blasts from military weapons may injure the brain through its blood vessels When military personnel fire certain powerful weapons, they may be exposed to blast waves that damage blood vessels in the brain. Jon Hamilton
RFK Jr. plans to keep a financial stake in lawsuits against the drugmaker Merck RFK Jr. plans to keep collecting referral fees in lawsuits against the drug company Merck even if confirmed as HHS secretary, according to new filings with the Office of Government Ethics. Sydney Lupkin
What life is like in cancer survivorship Cancer is increasingly survivable, but younger people are getting the disease at higher rates, then facing myriad challenges with life afterward. Yuki Noguchi
Trump administration tells federal health agencies to pause external communications NPR's Ari Shapiro speaks with Washington Post reporter Dan Diamond about the Trump Administration's directive to Department of Health and Human Services agencies to pause all external communications. John Ketchum