The S&P 500 index of big American companies hit a record high, climbing at one point by 0.8%; it closed the day up by 0.6%. The tech-heavy NASDAQ rose by nearly 0.5%. Investors are excited about AI again—Nvidia,

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Mass protests over decrepit schools and absent teachers are in their third week, with more planned. Officials have failed so far to quell a movement drawing many adult supporters. By Catherine PorterMark Landler and Ségolène Le Stradic A top aide to ...

The global energy system is already being pushed to the brink. A hurricane barreling down on America’s refining nerve center is the last thing that’s needed.

Climate change is blamed for dramatic decline of chinstrap penguins living on a remote volcanic island.

Despite political backlash and past weather delays, the massive wildlife bridge over the 101 Freeway in Agoura Hills is racing toward a Dec. 2 opening. Now, the only threat to the deadline is Mother Nature.