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introduced to incapacitate Superman, allowing Superman's voice actor Bud Collyer to take time off. This tale was recounted by Julius Schwartz in his memoir.pg 132-133 However, historian Michael J. Hayde disputes this. In "The Meteor from Krypton", Superman is never exposed to kryptonite. If kryptonite allowed Collyer to take vacations, that was a fringe benefit discovered later. More likely, kryptonite was introduced as a plot device for Superman to discover his origin."Since

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