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Hibernation Genes Means Pandas are Born Premature

One evolved feature in an animal can affect another feature. Of course, the environment is the main factor in determining which feature wins out. Some animals have developed hibernation to survive harsh winters, but this can affect foetal development. Bears in particular are born very small because of a short pregnancy due to hibernation. Pandas have this trait even though they do not hibernate. They carry the genes for hibernation, though it is not expressed. Oddly, panda cubs are born weaker than other bears. Adult pandas are 900 time larger than their newborns. This ratio is higher than other bears, though polar bear have a ration of 400:1. Mammals generally have a ratio of 26:1 overall. It seems that baby pandas are born prematurely as the norm. Their bones are underdeveloped. This is making survival of the species difficult. Without help from humans the species would have become extinct. Keywords: panda, science, bears, species, birth, news, animals, pan...