You probably guessed that an advent door featuring rabbits can only mean one thing: the famous Fibonacci sequence
1, 1, 2, 3, 5, 8, 13, 21, ...
First discovered in the 12th century by Leonardo Fibonacci while thinking about a problem involving baby rabbits, the sequence has since been found all over nature, from the spirals in sunflowers to the family tree of bees. It comes with a number called the golden ratio, famous for its interesting mathematical properties and a (supposed) connection to our sense of beauty.
The following articles will tell you all you need to know about the Fibonacci sequence and the golden ratio. Enjoy!
Return to the Plus advent calendar 2019.