Although it is widely held that infections and eating difficulties are hallmarks of advanced dementia,25 there are few prospective data on the incidence of these complications. Over the course of 18 months, more than half of the residents in our study had infectious episodes, and 86% had eating problems.
So 10 billion people is the uppermost population limit where food is concerned. Because it's extremely unlikely that everyone will agree to stop eating meat, Wilson thinks the maximum carrying capacity of the Earth based on food resources will most likely fall short of 10 billion.
Jupiter has a volume of 1,4313 Ã 1024 mÂ³. Earth has a volume of 1,083 Ã 1021 mÂ³. 1,4313 Ã 1024 m^3 / 1,083 Ã 1021 mÂ³ = 1322 Earths. But this is assuming Jupiter is completely filled with Earth volumes. If we stack complete Earths, the most optimal configuration is with sphere packing, which will fill 74% of the volume.