Director / Editor: Victor Teboul, Ph.D.

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Independent and neutral with regard to all political and religious orientations, Tolerance.ca® aims to promote awareness of the major democratic principles on which tolerance is based.

How was the wheel invented? Computer simulations reveal the unlikely birth of a world-changing technology nearly 6,000 years ago

By Kai James, Professor of Aerospace Engineering, Georgia Institute of Technology

People have long assumed that wheels evolved from simple wooden rollers. But how? And why? A new model focused on mechanical advantage and structural strength suggests some answers.

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