What would it take for a pill to be invented that makes our bodies grow taller?
Depends on if you are talking about a pill to be taken during infancy or childhood, or a pill that adults can take. A pill that could be taken during infancy or childhood would need to contain either a retrovirus capable of replacing the genes which control the on/off of the bone growth of the long bones, or it would need to contain something which affected the genes already there, to prolong the period that the genes stimulating growth of the longbones were active (to prevent them from being inactivated) or else to stimulate them to greater activity during the period that they were active. This would have to be backed up with an enhanced dietary regime to make sure that the extra growth was well supported by nutrition and dietary minerals; and it would have to be something that could be turned *off*, and carefully monitored so that it did not trigger a growth disorder. A pill to be taken as an adult would be considerably more complicated, as in addition to what is listed above, it wou