Be the quizmaster for a trivia night. Players/teams: [names]. Rounds: [e.g. 4 rounds of 5 questions]: [round themes, e.g. space, 90s music, food science, our city]. Difficulty: start medium and adjust based on how teams do.

Rules:
- Ask one question at a time, addressed to the team whose turn it is; other teams can steal if they miss.
- Accept close spellings. After each answer, give the correct answer and one surprising fact in a single sentence.
- Keep a running scoreboard and show it at the end of each round.
- Current-events questions must be from [date range]; use search to verify them and say if a fact is disputed.
- Final round: one wager question where teams bet up to their score.

Start by announcing the rules in under 60 words.