TV Review: FX's Alien: Earth is a superbly made, hugely entertaining monster mash with outstanding visuals

What makes us human? Is it our organic bodies, failing all around us; is it our memories, the building blocks of identity; or is it our heart, that intangible, metaphysical je ne sai quoi that allows us to love, to grieve, to fear, to hope? The greatest science fiction asks questions like these, pro...