In the fairy tale, Jack's beanstalk grew taller and taller until it reached the sky, enabling Jack to climb up to the giant's kingdom. The giant is depicted as a greatly enlarged version of a man with his body having the same relative proportions as a human. If there were giants with bones composed of the same material as human bones, could their proportions be the same as those of humans? Is there a limit to how high a beanstalk might grow and still support its own weight?
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