From a cubic millimeter of brain tissue, scientists have constructed a precise, 3D map of the activity in a mouse’s brain, detailing 84,000 neurons and more than 500 million synapses.

From Harry Potter to Ghostbusters, here are 13 franchises that should have ended – but didn’t.

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