Okay, so once upon a time there was a group of people who wanted to explore a really, really big place called Canada. It was so big that they didn't even know what was out there, so they decided to go on an expedition to find out.
This expedition was called the Great Northern Expedition, and it started way back in 1733. There were a bunch of different people in the group, including scientists, explorers, and even artists who wanted to document everything they saw.
They started out in St. Petersburg, which is a city in Russia, and then they traveled all the way across Russia to get to Canada. It was a really long journey that took them years, and they had to go through lots of different types of terrain, like forests, mountains, and even tundras (which are really cold, icy places).
When they finally got to Canada, they kept exploring for months and months. They wrote down everything they saw, drew pictures of the plants and animals they found, and even made maps so that other people could follow in their footsteps.
The Great Northern Expedition was really important because it helped people understand more about the world around them. They learned about new animals, plants, and places, and they could use that knowledge to make better maps and plans. Plus, it was just really cool to see all the different things that existed out there in the world.