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When curling became an official Olympic sport in 1998, it was met with a fair amount of curiosity and confusion, at least among people outside Canada, Scotland, and the Scandinavian countries where it has long been a winter sport tradition. Without an explanation of what's happening, curling can look downright bizarre: large stones sliding across the ice toward a target, while people vigorously sweep the ice in front of them as the person who threw the stone yells unintelligibly.

It's not obvious what skills are required for curling just by watching, which initially led people to poke fun at the event. More recent Olympic Games, however, have seen interest in curling grow as people find the sport strangely riveting. Now, curling has reached even greater heights of popularity, as evidenced by satirical curling-at-home videos popping up on social media.

Many of them use a combo of a Roomba and a Swiffer, which works perfectly:

Why Swiffer is not the official sponsor of all Olympic curling events is a mystery.

Some creators take it a little further, adding in the yelling component:

Others use different household items, like a teapot, for a curling stone and add commentary:

And believe it or not, someone even used a baby as a curling stone, with the caption, "When new dads in Canada are left unsupervised."

So how exactly did we get here?

The history of curling

No one knows the exact origins of curling, but there is evidence of the sport (or something like it) being played by monks on frozen lakes and ponds in Scotland in the 16th century. Farmers would join in curling games during the winter months, and as the sport evolved through the 1800s, it became more organized. Rules were formalized, and people began traveling to watch and participate in competitions held outdoors in large Scottish cities. The Scots eventually took the sport with them to other countries, and by the 1900s, curling had transformed from a Scottish outdoor pastime into an international, mostly indoor sport.

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How does curling work as a sport?

Curling is played by two teams of four, with each team aiming to get its eight stones closest to the center of a target called a "house." Teams alternate "throwing" their stones, which really means gliding them along the ice. Sweepers brush the ice to help guide the stones, while the team captain, or "skip," gives directions, often by yelling, to place the stones where they want them to go.

After all 16 stones are thrown, the team with a stone closest to the center of the house scores one point for each of its stones that landed inside the house. The other team does not score at all in that round, called an "end." There are eight or 10 ends per game, depending on the event, and the team with the most points after all the ends have been played is the winner.

Here's a visual explainer that goes through the basics:

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Fun facts about curling

Tara Peterson of the USA Curling National Team shared some interesting facts about curling with Columbia Sportswear:

• Modern curling stones are made of granite that comes from only two places: a quarry in Wales and an uninhabited island off the coast of Scotland called Ailsa Craig.
• Curling is called curling because of the way the stone curves depending on how it's spun, but exactly how that happens is still a bit of a scientific mystery. Curling stones actually move in the opposite direction of what the turn would normally dictate according to physics.
• Despite the yelling, curling is considered a polite "gentleman's" sport, with traditional etiquette rules observed before and after the game.
• Though it may not be immediately obvious, you have to be in pretty good shape to curl. Throwing a 42-pound stone, even on ice, isn't as easy as it looks, and the person throwing it must remain crouched close to the ground for long periods. Sweeping also requires arm strength and cardiovascular endurance.

Curling requires more athleticism than it first appears.Photo credit: Canva

• Curlers wear two different shoes, one designed for gripping the ice and the other for sliding. The slider sole is made of Teflon or stainless steel, while the grippy sole is made of rubber.
• Curling is called the "roaring game," which might sound odd, but the sound of the stones gliding over the ice is apparently much louder in person than it sounds on TV.

Every sport is more fun to watch when you actually know what you're seeing, and curling is no exception. If you're wondering who to watch, Canada has traditionally dominated the sport, though Sweden trails by only two medals in total Olympic curling medals. And if you're curious how Scotland fares as the original home of the sport, its curlers compete under Great Britain's flag.