Even back when humans were living in caves, the UFEES (YOU-fees) would manage to find a way to help them solve many of their daily problems. The UFEES Discovery Series makes known a select few of these problems, as well as their primitive but elegant solutions.
More specifically, the solutions presented in this volume are based on the use of what are commonly referred to as “simple machines;” that is, machines that have no moving parts. The “simple machines” introduced herein are the wheel & axle, and the ladder.
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