Barrier/biology

Famous quotes containing the words barrier and/or biology:

    To say that a thing has never yet been done among men is to erect a barrier stronger than reason, stronger than discussion.
    Thomas Brackett Reed (1839–1902)

    The “control of nature” is a phrase conceived in arrogance, born of the Neanderthal age of biology and the convenience of man.
    Rachel Carson (1907–1964)