One must believe that every living thing whatsoever must change insensibly in its organization and in its form...One must therefore never expect to find among living species all those which are found in the fossil state, and yet one may not assume that any species has really been lost or rendered extinct.


Systême des Animaux sans Vertèbres, (1801) trans. D. R. Newth, in Annals of Science, 1952, 8, 253–4

Jean-Baptiste Lamarck Quotes

One must believe that every living thing whatsoever must change insensibly in its organization and in its form...One must therefore never expect to...

One must believe that every living thing whatsoever must change insensibly in its organization and in its form...One must therefore never expect to...

One must believe that every living thing whatsoever must change insensibly in its organization and in its form...One must therefore never expect to...

One must believe that every living thing whatsoever must change insensibly in its organization and in its form...One must therefore never expect to...