Complex sentence: In time, humans learned to store berries so that they could be used in the winter, and they may be made into fruit preserves, and among Native Americans, mixed with meat and fats as pemmican.
Split into simpler sentences: In time, humans learned to store berries so that they could be used in the winter. They may be made into fruit preserves, and among Native Americans, mixed with meat and fats as pemmican.