The governors, including two Republicans and governors of four states that voted for President Trump in 2016, are urging his administration to halt his rollback of clean car rules.

The two giant states have set some of the world’s most ambitious climate targets, aiming to slash emissions close to zero in just decades.

There were 30 horse deaths in six months. Many blame a culture of chasing profits and a racing surface trainers say was unsafe.

As wildfires grow more intense, fire chiefs in Southern California are looking to big data and machine learning for help in managing fast-moving blazes.

Lobbying by celebrity opponents has drawn national attention to a measure that would make medical exemptions to vaccination harder to get.

In a letter signed by 17 industry giants including Ford, General Motors and Toyota, the firms asked Mr. Trump to go back to the negotiating table.

Instead of synthesizing new biochemicals from scratch, the Nobel Prize-winning chemist puts nature to the task — with astonishing results.

A state jury’s award for a Northern California couple followed awards in separate cases in March and August, and was the largest by far.

A former Navy officer who is now a New York Times reporter explains how the American military trains marine mammals for underwater operations.