Right--but that's half the problem! You can't tear people apart to figure out why they're depressed. Not only will no one volunteer to be torn apart, but it wo

Right--but that's half the problem! You can't tear people apart to figure out why they're depressed. Not only will no one volunteer to be torn apart, but it won't tell you much anyway: depression (probably) isn' a property of a single protein or cell. In a sense, this is actually my day job: I work with animals where we can dig down to the level of a single neuron or sometimes even a single molecule....but it's still different enough that you still need to go back to intact, living people to see if your proposed treatment works.