Fentanyl is a synthetic opioid. Cheap to make, it is about 50 times as powerful as pure heroin. Of the reported 107,081 drug overdose deaths in America last year, more than two-thirds involved synthetic opioids other than methadone. A gram of fentanyl is so dangerous that experienced drug users have been known to die after making some careless dosing error.

Many questions have yet to be raised and debated about what went wrong for Israel in Gaza. But what stands out are hard-learned lessons about expecting too little from one’s enemies and presuming too much from tactics and information that may have worked before but become seriously outdated after enough conditions change.

There’s long been a gap between the relatively small number of organs available for transplant and the long waiting lists of potential recipients. Last week, the world got a little closer to a future in which pigs — yes, pigs — could narrow that gap. A new study, published in Nature, showed that a monkey […]

Trump’s attack invokes a theme from Hitler’s autobiographical manifesto “Mein Kampf,” in which the Nazi Party leader railed about what he called the impurity of immigrants, Jews and interracial couples.

We have a crisis at the border that requires a functional U.S. Congress, and we don’t have one. President Joe Biden can only do what he can, and only of late has he sounded resolute.

The fossil fuel companies are wrong. We can’t just count on technology. We have to stop burning those fossil fuels.

With Russia-Ukraine and Hamas-Israel diverting U.S. and global attention — especially diverting their military power — is this the moment Beijing attacks Taiwan?

Los Angeles schools are increasingly passing students who don’t even meet grade-level standards. This is and will have important ramifications for their future. Nearly 60% of students come from low-income families. It’s hard to argue that the imposition of this woke curriculum will improve their lives.

The Hamas terror attack, together with the ongoing Ukraine war and the looming Chinese threat to Taiwan, is putting a spotlight on the pitiful state of our capacity to manufacture the weapons necessary to the defense of our allies and ourselves.

Far too many Americans are forced to ration life-saving medicine — like the 8.4 million that rely on insulin. In the wealthiest nation on Earth, this shouldn’t be our reality.