This Tiny Fish’s Mistaken Identity Halted a Dam’s Construction

Scientists say the snail darter, whose endangered species status delayed the building of a dam in Tennessee in the 1970s, is a genetic match of a different fish.

The House begins voting in hours. Here’s what to know.

The Louisiana Republican was unanimously nominated as his party’s candidate for speaker. But resistance among right-wing lawmakers and his slim majority have thrust his fate into doubt.