Neuroscientist Uri Hasson takes us inside his lab’s fascinating research — and our heads — to show the meeting of the minds that occurs every time we talk to each other.

The past decade has brought us jaw-dropping insights about the hidden workings of our brains, in part thanks to a popular brain scan technique called fMRI. But a major new study has revealed that fMRI interpretation has a serious flaw, one that could mean that much of what we’ve learned about our brains this way might need a second look.