Complex sentence: The project was eventually shut down when the military showed no interest but was recently reactivated when Warner discovered the inhabitants of Dimension X could synthesize any chemical desired at the cost of some components and a couple of "human specimens".
Split into simpler sentences: The project was eventually shut down the project when the military showed no interest. However, the project was reactivated when Warner discovered the inhabitants of Dimension X could synthesize any chemical desired at the cost of some components and a couple of "human specimens".