Humans have been drilling holes into each others’ heads for thousands of years, and, surprisingly, we’ve actually been pretty good at it, even way back when. A re-analysis of a 5,000-year-old cow’s skull suggests humans were performing cranial surgery on animals as well—but why would they even bother? The answer could…
Source: Gizmodo – Why in the World Did Ancient Humans Perform Brain Surgery On This Cow?