When fentanyl, a synthetic opioid 50 to 100 times more powerful than morphine, infiltrated the drug supply in the U.S. it had an immediate, dramatic effect on the overdose rate.
The U.S. government says warming ocean temperatures and melting ice have resulted in the "most unprecedented transition in history" in the Arctic, leading to extreme weather events across the globe.
NPR's Ari Shapiro talks with climate scientist Stephanie Herring about why the argument "the climate is always changing" is problematic in explaining the temperature changes around the world today.
Federal officials at the U.N. climate meeting are ignoring climate science and touting coal and fossil fuels. But local and state authorities pledge to reduce greenhouse gas emissions on their own.
A small hole in spacecraft Soyuz MS-09 has sparked an investigation into its origin. Cosmonauts spent hours on a spacewalk to gather samples in hopes of determining its cause.
The Pentagon is exhuming all of the more than 650 Korean War unknowns in a Honolulu military cemetery. Advances in DNA technology and other forensics make their identification highly likely.
Hundreds of newspapers have closed across the country. The loss of local reporting means fewer investigations into fraud and waste. That has had an impact on the budgets of cities and towns.