In the wild, male emus take the responsibility of keeping the eggs warm, turning them, and protecting the clutch of 10-20 eggs from predators. He will rarely eat or even stand for the next 43-50 days until the chicks hatch.

At emu ranches, eggs are usually collected and put into a special incubator which performs several important functions. It keeps the eggs at a precise temperature (96.5-97 degrees), it blows fresh air over the porous eggs, provides a slowly evolving humidity, and rolls the eggs in both directions many times during the day. It has taken years to develop excellent incubators like this one that can do what a male emu does without even thinking about it! :D

If you would like to know more about hatching emu eggs, I found a wonderful article here: The Poultry Site: Incubation of Ratites