An autograph is a famous person's signature, but what determines how valuable it is? Marshall Brain discusses the relative value of autographs -- and what you can do to increase the value of your own signature.
Welcome to the Brain Training Podcast, the daily audio workout for your head.
In this podcast we have two games for you, each with three rounds which get progressively harder.
To enjoy the full experience, relax, and avoid distractions whilst you listen.
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