National Geographic is peeling back the skin to go deep inside one of the Earth's most mysterious creatures, combining biology with palaeontology to explore all its guts and glory. T-Rex Autopsy will literally go under the skin of a full-size T-Rex for the first time ever to reveal how the 65-million-year-old beast may have lived. The massive monster will be life- like inside and out, giving scientists the chance to touch it, smell it, scan it, X-ray it and cut it open from head to toe.