The federal agency tasked with weather forecasting and research has played a growing role in climate policy, but also faced controversy during the Trump administration. What does NOAA do?

The Delta variant is driving new COVID-19 surges, even as countries around the world make gradual progress in vaccinating their populations. Five graphics show how the strain is taking over and who’s…

Vaccines are a major public health success story, but the COVID-19 pandemic underscores the many challenges involved in getting a vaccine to everyone who needs it.

Violence between rival Shiite factions has raised concerns that Iraq’s weak government is facing prolonged political upheaval.