31.   Skulls are everywhere.

32.   The brain capacity of fossil hominids can be hard to measure because the skulls are often crushed or incomplete.

33.   The rare surgery involves partially removing a fetus, legs first, from the womb into the birth canal, where its skull is pierced and its contents drained.

34.   The skull is the symbol of death, and that symbol can be seen everywhere, from candy to toys to decorations.

35.   The skull was off-limits.

36.   The skull was that of a modern man and the jaw that of a modern orangutan with its teeth filed down.

37.   The skulls were unearthed from deep pits that are still littered with shards of bone and frayed strips of cloth.

38.   The skull is crushed to complete the procedure.

39.   The skull was cracked but intact and at least two molars were found.