In 1822, villagers found a White Stork with a spear lodged in its neck: The wounded bird became the first proof of bird migration

For most of human history, one of nature's simplest questions had no real answer: Where do birds go when winter arrives, and th ey vanish from the sky? People had guesses, but almost nobody had actual proof. Then, in the spring of 1822, a wounded bird landed in a small German village and accidentally settled a debate that existed for centuries.

But what made this discovery was not any technological advancement instead it was an injury.