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A recent study found that eating ultraprocessed plant-based foods was linked to heart attack and stroke risk. But the devil is in the details

Extreme heat can cause train tracks to expand and buckle. That’s forcing rail operators to adapt as the climate warms

A woman with life-threatening heart and kidney disease became the second person ever to receive a genetically modified pig kidney and the first person to receive a heart pump and a transplanted organ together

The world will be watching—literally—as SpaceX tackles possibly what might be its highest-stakes endeavor to date: safely destroying the beloved International Space Station

I watched United Nations delegates debate AI-based weapons that can fire without human initiation. Humans cannot be taken out of that decision-making

Scientific American sat down with Nicola Fox, head of NASA science, to talk about her LEGO-building hobby, the agency’s massive Space Launch System rocket and the NASA science she’s most excited about