Gosh, take the idea seriously for a second: think of the accomplishment of putting a detector down there! We're a few generations out from even hoping to have t

Gosh, take the idea seriously for a second: think of the accomplishment of putting a detector down there! We're a few generations out from even hoping to have the material science needed for it, but maintaining a comm link with a thing through the mantle is strangely uncommon science fiction. Like it's too wild an idea to ever take seriously. Unlike, say, warp drives and indefinite longevity.