Welcome back to Slate’s weekly news quiz. I’m your host, 74-time Jeopardy! winner Ken Jennings.

Typically every Friday, I test your knowledge with 12 challenging questions on the week’s news events, big and small, including happenings in science, sports, politics, and culture both high and low. This week, however, we are looking back on 2015 with a special year-in-review quiz, so shake off those mental cobwebs. The format is still the same, though. The questions are multiple-choice, and time is of the essence: You have 30 seconds to answer, and as the seconds tick away, the question’s point value drops from 50 all the way down to zero, so you’ll want to click on your answer as fast as you possibly can. There’s no penalty for an incorrect answer, so feel free to take a guess if your puny human brain fails you.

At the end of the quiz, you’ll be able to compare your score with that of the average contestant, as well as with the score of a Slatester whom I’ve talked into taking the quiz on the record. Our contestant this week is Gist host Mike Pesca.

Think you can ace my quiz and beat Pesca? Good luck!