It’s called the lateral frontal pole and scientists say its main function is to help you know when you’ve made a bad decision.
In other words, Dennis Rodman and Mike Tyson might have very small ones.
The key man behind the finding is Oxford researcher Matthew Rushworth.
"There are a few brain areas that monitor how good our choices are,” he began.
“But this region monitors how good the choices are that we didn't take.”
The Guardian reports in order to make the discovery the doctors plotted the brain of 25 people with two imaging techniques and combined the results.
They found connections between the ventrolateral frontal cortex (language and cognition), and the rest of the brain.
Then they looked at monkey brains checking for the same regions.
Results showed monkeys only had 11 of the regions while humans have the 12th.
In simpler terms the frontal pole is a portion of "what makes us human."