Not all of North America. The last Ice Age's ice sheets spread all the way down to what is now the US/Canadian border, and that's about as far south as the ice went.
1698
Yup!
It carved the mountains and valleys and rivers and many lakes. The ice made most of the topography that exists today. Erosion gradually lessens the effect of the ice carving the land. It also killed most of the life here.
Nebraska and Iowa
no
Maybe...
Maybe...
Yup!
Horses were brought to America by the conquistadors. Therefore they were not in North America during the ice age.
It helped them go from Asia to North America
Yes, Prehistoric horses became extinct in North America during the Ice Age. Recent research has suggested that their extinction was either climate related or human induced. The Spanish brought over horses to the America's in the 15th century - as can be reinforced by multiple indigenous American accounts of Spanish arrival.
none of these
North America
Eurasia And North America Pre-Ice Age