Glaciers form when ice reaches a certain thickness and starts to move under its own weight so they do form all the time, but yes most of our current glacial mas

Glaciers form when ice reaches a certain thickness and starts to move under its own weight so they do form all the time, but yes most of our current glacial mass originated during the last glacial period which ended almost 12,000 years ago. We're technically still in an ice age because we've got ice sheets on the north and south poles.