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.

Why some humans grow horns

By Dan Baumgardt, Senior Lecturer, School of Psychology and Neuroscience, University of Bristol

Keratin is the tough protein that forms hair, nails and hooves. It’s also responsible for something far stranger: human horns.

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