How far does freedom of religion really go? This quiz tests what the First Amendment protects and what crosses the legal line.

At-home tests of the gut's microbiome are trending, but doctors say the technology is getting ahead of medical knowledge.

President Donald Trump has suggested the U.S. will restart nuclear weapons testing, a move that upends decades of American policy.

Organizing curriculum around a central story motivates students to advance the narrative while mastering advanced material.

By holding nuclear drills and boasting about a successful test of a pioneering atomic-powered cruise missile, Russian ...