21.   The complex structure of the human ear allows us not only to hear sounds but to know where they are coming from.

22.   The man who grew a human ear on the back of a mouse has made a breakthrough that brings the prospect of an artificial liver much closer.

23.   The only saving grace for Galloway and the Cowboys was that there were hardly enough of them to make it audible to the human ear.

24.   They have, in fact, deteriorated, since the human ear has become unaccustomed to the wonderful elixir of silence.

25.   This processing is based on how the human ear itself works.

26.   When sound waves enter the human ear, they stimulate neurons called hair cells that lie on a flat plane.

27.   When the Montagnards once delivered a bagful of human ears as proof of their body count, he ordered them to stop.

28.   You can imagine what this noise does to human ears.

29.   American scientists have grown a human ear and grafted it on to the back of a mouse.

30.   Noise from auto-focusing and film advance motor is reduced and muffled, rendering it inaudible to the human ear in most conditions.