Two events. Tap the one that happened first.
You get 10 rounds a day. They start centuries apart and end a few years apart. Round 7 is the plot twist, where your gut will probably be wrong. Everyone gets the same rounds, and new ones come at midnight.
After the daily rounds, try Streak mode: it goes on until your first wrong answer. Keys: 1/← or 2/→ to pick, Enter for the next round.