I WONDER - What Is A Hockey Puck Made From?

The video discusses the evolution of hockey pucks, starting with the use of cow dung, which was frozen for use in games. These were replaced by wooden pucks, and later, rubber pucks were introduced by slicing rubber balls. In the 1880s, round pucks became standard, a practice that continues today.

In which decade were round pucks introduced to the game?

What shape of pucks do we still use today?