"Abrupt thawing" can make the melting permafrost release large amounts of methane in a short time. The release of the methane won't be spread safely over centuries — it could be concentrated in decades.

Arctic Is Thawing So Fast Scientists Are Losing Their Measuring Tools. Several meters of soil can come loose in a few days.

Abrupt thawing can cause landslides and transform terrain beyond recognition.

The bully's tariff threat to Mexico was theater. Mexico had agreed to most of the concessions already.

Mexico has been serving as a US border control agent for years.

The heat wave in Europe interfered with nuclear power plants because they couldn't get the river water they require for cooling.

Technology and the labor market combine to make many people too busy to think much.

Rep. Amash says that the Republican Party is now so rigid there is no room for any disagreement or independence.