The Impossible Chessboard Puzzle

Probably the most gentle and most entertaining way to see your brain explode in 2020. The video starts with a quite tricky brain-teaser puzzle, but then goes on to explain — with the help of 64-dimensional cubes — why, under most circumstances, the puzzle is actually mathematically impossible to solve. If I haven’t scared you away at this point (hello, anyone still here?), you’re going to love it.