Catacomb culture is a group of people who lived a very long time ago, like when dinosaurs were still alive. They lived in a place called the Eurasian steppe, which is like a big grassy area that went on for miles and miles. These people lived in underground places called catacombs, which are like tunnels and rooms dug into the ground.
These people were really good at making things out of metal, and they also knew how to ride horses really well. They would use their horses to hunt for food and to move around faster than just walking. They also had a special way of burying their dead, which was in underground chambers that were decorated with carvings and paintings.
The catacomb culture people were very important because they helped shape the way people in that part of the world lived, and they influenced a lot of the art and traditions of the people who came after them.