 What do the Kar-Rah have in common with 20th century humans?
Loy Chuk had flown his geological expedition out from the far lowlands to the east, out from the city of Kar-Rah. A perfect preservative for organic tissue, aided probably during most of those passing eras by desert dryness. Not the star-conquering demi-gods, but the ancestral stock that had built the first machines on Earth, and in the early Twenty-first Century, the first interplanetary rockets. Medical and biological sciences were far advanced among Loy Chuk's kind. Far out in a deep valley, Kar-Rah, the city of the rodents, came into view—a crystalline maze of low, bubble-like structures, glinting in the red sunshine. Loy Chuk's people had built their homes mostly underground, since the beginning of their foggy evolution.
 Large crania
 An erect posture  General height  Language  Large crania