Curling is one of the world's oldest team sports.
It originated in the 16th century in Scotland, with games played on frozen ponds and lakes.
While it's been around for a while, curling didn't become an official Olympic sport until 1998.
At PyeongChang, curling is already in full swing and runs through most of the games. See the schedule here.
Check out the complete Rookie's Guide to Curling here.