An analysis shows that large fractions of future generations will be exposed to extreme climate events that would occur only once every 10,000 years in the absence of global warming.

The terrorist massacre of 26 innocent people has magnified the alienation long felt in a region that lives under tight watch and has limited democratic rights.

Greater insights into what makes people happy, secure and hopeful will make for a better world.

The Trump administration told researchers it was “releasing” them from their roles. It puts the future of the assessment, which is required by Congress, in doubt.