During the prime of that "Ice Age" northern Europe down to about the top third of France and Germany etc. was covered with a relatively thick year-round ice sheet. That meant that all human and game-animals of that period had to move down south. read more
By the time the last ice age rolled around, evolution had already come up with mammals. The animals that managed to thrive on an ice age were generally quite large and fur-covered. Scientists call them “Megafauna,” and they managed to survive the cold climate because they had already evolved in freezing places such as Tibet. read more
Technically we live in an ice age right now, an ice age is just defined as a time period when a significant portion of the earth's surface is covered in ice year round, thanks to Greenland and Antarctica the current earth easily qualifies. read more