Nidaros Cathedral facts

While investigating facts about Nidaros Cathedral Trondheim and Nidaros Cathedral Trondheim Norway, I found out little known, but curios details like:

A statue of the Archangel Michael on top of the Nidaros Cathedral in Norway is based on Bob Dylan, inspired by Dylan's opposition to the Vietnam war.

how nictitating membrane works?

The construction of the Norwegian Nidaros Cathedral began in 1070 but wasn't officially completed until in 2001.

What is nictitating membrane?

In my opinion, it is useful to put together a list of the most interesting details from trusted sources that I've come across answering what is the function of the nictitating membrane. Here are 2 of the best facts about Nidaros Cathedral Interior and Nidaros Cathedral Organ I managed to collect.

what do you think is the function of the nictitating membrane and why?