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With Aid Cutoff, Trump Severs a Lifeline for Millions

Shock and grief rippled through the health community as lifelines for care were abruptly severed.

Β© Kang-Chun Cheng for The New York Times

Mercy Githinji cared for 100 households in the Kayole neighborhood of Nairobi when the clinic where she worked, run by the U.S.A.I.D. Tumukia Mtoto Project, closed down.

What’s Best, According to the Italian Mathematician Alessio Figalli

Alessio Figalli studies optimal transport, a field of math that ranges from the movements of clouds to the workings of chatbots.

Β© Michelle Gustafson for The New York Times

Alessio Figalli, a mathematician at ETH Zurich and a current member at the Institute for Advanced Study in Princeton, N.J., investigates β€œoptimal transport,” the study of starting points, end points and the paths between.

Her Discovery Wasn’t Alien Life, but Science Has Never Been the Same

The internet erupted in controversy over Felisa Wolfe-Simon and colleagues’ claim of a microbe thriving on arsenic. Nearly 15 years later, she’s pursuing new research on the boundaries of life.

Β© Marissa Leshnov for The New York Times

Felisa Wolfe-Simon, a research scientist who presented findings in 2010 that suggested arsenic could be a building block of life.

New Insights Into Older Hearts

Heart disease is more common in people over 65, but treatments are better than ever. That can complicate decision-making for older heart patients.

Β© Ann Johansson for The New York Times

Implantable cardioverter defibrillators can deliver a shock to the wearer’s heart in the case of sudden cardiac arrest.

What’s Best, According to the Italian Mathematician Alessio Figalli

Alessio Figalli studies optimal transport, a field of math that ranges from the movements of clouds to the workings of chatbots.

Β© Michelle Gustafson for The New York Times

Alessio Figalli, a mathematician at ETH Zurich and a current member at the Institute for Advanced Study in Princeton, N.J., investigates β€œoptimal transport,” the study of starting points, end points and the paths between.

Her Discovery Wasn’t Alien Life, but Science Has Never Been the Same

The internet erupted in controversy over Felisa Wolfe-Simon and colleagues’ claim of a microbe thriving on arsenic. Nearly 15 years later, she’s pursuing new research on the boundaries of life.

Β© Marissa Leshnov for The New York Times

Felisa Wolfe-Simon, a research scientist who presented findings in 2010 that suggested arsenic could be a building block of life.
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