Corrected entry: The science of Pandora is all wrong. For example, they have regular days and nights there, but Pandora is not a planet, circling a sun, it's a moon, circling a planet. The days and nights would coincide with the rotation around the planet. For an extended period, when the planet was between Pandora and the sun, it would be dark, probably weeks at a time, and the opposite for daylight hours. In addition, because Pandora is a satellite of a gas giant, that means its orbit would be millions of miles in variance. There would be a few weeks of winter as it came several million miles further from the sun in its orbit, and then it would be several weeks of blistering summer as it came closer. The vegetation and ecology of the movie are treating the moon as if it had the same cycles and system as a planet, which is impossible. Even it took Pandora a year or more to orbit its planet, so that seasons were more regular, that means it would be in darkness for months as the planet was between it and the sun. If it rotated in a month, that means that it would be going through all 4 seasons 12 times a year, or however many months there were to a Pandoran year.