Why are horseshoes believed to be lucky?

So far, I have devoted a long time to find out accurate explanations for my research. Since now, mankind owes me a lot because through out my research people have found answers for their unanswered questions.

In 1700, a French man called Henry Misson, visiting Britain, asked villagers why they had horseshoes nailed above their doors.

They said that it was to keep witches away. Horseshoes are made of iron and the strength of the iron was thought to protect from evil.

Still today they are thought to bring good luck and many brides carry silver ones at their wedding.

The position of the horseshoe is very important. It must point upwards like a cup so that the luck cannot fall out.