What was the Seven Bridges of Königsberg?

Imagine trying to go for a sunny Sunday walk, only to discover the path is mathematically impossible! In 1735, the beautiful city of Königsberg had two huge islands sitting right in the middle of a wide river, connected to the rest of the town by exactly seven bridges. The townspeople made up a massive puzzle: could anyone walk across all seven bridges exactly once without ever crossing the same one twice? People tried for years, wandering around and tracing maps, but everyone got stuck! It wasn't because they were bad at directions—it was because of math! A brilliant young mathematician named Leonhard Euler decided to solve the mystery. Instead of walking the bridges himself, he erased the entire city from his map and replaced the land and bridges with simple dots and lines. By inventing the world's very first mathematical network, he proved the famous walk couldn't be done! Join Mira and Finn on Maths is Not Boring as they uncover how Euler’s amazing join-the-dots trick gave us the amazing graph theory used to power map apps and the entire internet today!