When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. About 5,000 years ago, humans used crude stone tools to puncture a hole in a cow's head, making ...

Breakthroughs, discoveries, and DIY tips sent every weekday. Terms of Service and Privacy Policy. Bovine brain surgery is pretty rare. So if you were visiting the ...

This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated. Humans have been performing cranial surgery ...