Incubator History...did you know?
Those are EGGS in there!
Very, very interesting. I would like to know how they turned that many eggs. The design looks similar to a mud pizza oven with a few tweaks. I tried to find possible DIY instructions, but didn't find any. I would be very interested in finding some and learning just how they work. I bet it isn't very complicated as people make DIY incubators all the time.