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This is the story of an earnest English teacher and the precocious 10-year-old who hated him. It’s about how that girl grew up to pull off several lifetimes’ worth of death-defying feats. And how, a few weeks ago, she performed the most spectacular one of all. More than 40 years after Montana Miller left her fifth-grade nemesis behind, she gave him a gift that she hoped would save his life. (Abraham, 5/19)

The state is leading the country’s reckoning with PFAS. The outcome of its suit against the federal government will affect how courts treat more than 15,000 other claims nationwide. (Nazaryan, 5/19)

James Antaki’s efforts to develop a baby’s heart were close to success when his federal funding was cut off. The grants were eventually restored; rebuilding what was lost wasn’t so easy. (Bajaj, 5/18)

The prehistoric hominins “apparently were very adept at what we would consider invasive medicine,” said the anthropologist John Olsen. (Lidz, 5/19)

A group of people watched three albino rats leap from small baskets into a big cage on Sunday as other rodents hid in makeshift tunnels or searched for applesauce offered by their keeper through the bars at an indoor hall in the Argentine capital. It’s Ratapalooza, an annual Buenos Aires event that promotes the adoption of rodents raised in animal facilities or used for research in science labs — once the animals are no longer useful, have outlived their purpose or are just surplus stock. (Calatrava and Pisarenko, 5/18)