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Although xylazine is not an opioid, naloxone can reverse the effects of the fentanyl and heroin it is often mixed with. AP Photo/Jae C. Hong

What is xylazine? A medical toxicologist explains how it increases overdose risk, and why Narcan can still save a life

Xylazine, or tranq, is increasingly being mixed with drugs like fentanyl or heroin and can be difficult to detect. Most people who use drugs are unable to tell if they have been exposed to it.
Former U.N. Ambassador and South Carolina Gov. Nikki Haley announces her presidential run in Charleston, S.C, on Feb. 15, 2023. Bill Clark/CQ-Roll Call via Getty Images

Presidential hopefuls are considering these 5 practical factors before launching their 2024 campaigns

Senators, governors, representatives and past presidents have to weigh multiple factors before declaring their 2024 run for president. Campaign financing is one of them.
Magnetic levitation is just one of the interesting attributes that make superconductors so interesting. Mark Garlick/Science Photo Library vie Getty Images

How do superconductors work? A physicist explains what it means to have resistance-free electricity

Superconductors are materials that can transmit electricity without any resistance. Researchers are getting closer to creating superconducting materials that can function in everyday life.
The Coretta and Martin Luther King Jr. memorial sculpture at Boston Common is called ‘The Embrace.’ Lane Turner/The Boston Globe via Getty Images

Reaction to bronze sculpture of Coretta and Martin Luther King Jr. in Boston hasn’t been good – and that’s not bad for art that shatters conventions

A memorial to Coretta Scott and Martin Luther King Jr. has received stinging criticisms, but time will tell whether ‘The Embrace’ will endure as a cherished work of public art.
Fed chair Jerome Powell opted for a cautious approach on rates. Alex Wong/Getty Images

Federal Reserve bows to bank-crisis fears with quarter-point rate hike, letting up a little in its fight against inflation

The Fed raised rates by a quarter-point – less aggressive than had been expected before the current banking crisis, but signaling inflation is still its focus.

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