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Harvard researcher Kit Parker built his academic career studying the heart. But Parker, also an officer in the U.S. Army Reserve, switched his focus to figuring out how IED blasts damage the brain.

Mundi the African elephant was the pride of Puerto Rico's only zoo. But her fate became entangled in the island's recent struggles with natural disasters and a debilitating debt crisis.

NPR's politics team annotated Trump's speech on immigration, which comes after a week of seeming to change direction on the issue.

Edward Humes describes his new book as a "transportation detective story" that chronicles the hidden characters, locations and machinery driving our same-day-delivery, traffic-packed world.

The CEOs tell Congress that the giant American tech companies do not stifle competition, saying the concern that too much power is concentrated in too few companies is unfounded.

The Centers for Disease Control and Prevention shifted its stance this week on the need to wear masks if you're vaccinated. What's that mean for kids? For travel? For work? Experts weigh in.

When patients can't afford to pay their medical bills, many hospitals offer a payment plan — or free or discounted care. But some try to collect by suing patients and garnishing their wages.

Cybersecurity reporter Kim Zetter warns that our election systems, including our voting machines, are vulnerable to hacking: "We can't rule out that elections haven't already been manipulated."

Republicans are firmly behind the president in public, but privately worry that he could hurt the GOP's future. Democrats have been consumed by infighting for most of the year.

Millions of U.S. educators are scrambling to replicate the functions of school without an actual school building. One principal's advice is to just "focus on loving our kids."