Tracey Mumford

At their fastest, the sleds can hit almost 100 miles per hour.

Moving on to the next Olympics question.

This year, a new sport is making its debut at the Games.

Do you know what it is?

I will give you three options.

Two of these are decidedly not Olympic sports.

One is the correct answer.

They are synchronized speed skating, where two athletes have to race around a track as fast as they can while staying in lockstep.

Ski mountaineering, in which athletes ski and run uphill, then race back down to the bottom.

Or luge biathlon, where two-person teams have to hit targets with their rifles while on a fast-moving sled.

So that's synchronized speed skating, ski mountaineering, or luge biathlon.

The answer is ski mountaineering or ski-mo, luckily, because luge biathlon is a terrible idea.

And last question.

There are a handful of countries that traditionally dominate the Winter Olympics.

No surprise, they are countries with snow.

Can you name the top three countries that have won the most medals at the Winter Games ever?

The answer, in third place, Germany.

In second, it's the U.S.

And the country with the most Olympic winter medals, more than 400 of them, is Norway.

Norway, though, is going into this year's Olympics a little tarnished.