Copper has a long, rich history with mankind.

It was the first metal to be used by humans, to be smelted from its ore and to be cast into a shape from a mold.

Researchers in Canada used cadaver limbs to study the effects of hoof angles and loading patterns on joint surface contact areas in the fetlock. Eight limbs from Standardbred horses that died for reasons unrelated to this study were fitted into a mechanical pendulum device to simulate hoof strike at a trot. Strips of pressure-sensitive film were placed across the joint surfaces inside the fetlock to measure contact areas, and the limb was loaded while simulating flat, toe-first and heel-first landings.