Scientists say the map of a speck of a mouse's brain could be as transformative as the Human Genome Project. Here's what to know.

Thanks to a mouse watching clips from “The Matrix,” scientists have created the largest functional map of a brain to date – a diagram of

Thanks to a mouse watching clips from 'The Matrix,' scientists have created the largest functional map of a brain to date – a diagram of the wiring connecting 84,000 neurons as they fire off messages.