“Vocal behavior must have had several advantages in natural selection. Sounds are effective in the dark, around corners, and when listeners are not looking, and they can be made when the hands are busy with other things.” (p. 80)
“Vocal behavior must have had several advantages in natural selection. Sounds are effective in the dark, around corners, and when listeners are not looking, and they can be made when the hands are busy with other things.” (p. 80)