With what adaptation was a person able to survive the ice age?

The Ice Age became an obstacle to the development of mankind. Due to lower temperatures, the number of people on Earth has also decreased. This is due to the fact that the rest were unable to survive the cold. A huge glacier covered most of the Eurasian continent. People settled on the equator in order to survive. There they mastered new ways of hunting and fishing. Agriculture developed poorly. The ancient members of the human race used animal skins to survive. They also built insulated houses.