All knowledge that is not the real product of observation, or of consequences deduced from observation, is entirely groundless and illusory. — Jean-Baptiste Lamarck Copy Share Image
The thesis that the living creatures have always been composed different species was established in a time where no sufficient observations had been made and when science hardly existed. This thesis is denied every day by those who have made… — Jean-Baptiste Lamarck Copy Share Image
One must believe that every living thing whatsoever must change insensibly in its organization and in its form... One must therefore never expect to… — Jean-Baptiste Lamarck Copy Share Image
All known living bodies are sharply divided into two special kingdoms, based upon the essential differences which distinguish animals from plants, and in spite… — Jean-Baptiste Lamarck Copy Share Image
After having produced aquatic animals of all ranks and having caused extensive variations in them by the different environments provided by the waters, nature… — Jean-Baptiste Lamarck Copy Share Image
What nature does in the course of long periods we do every day when we suddenly change the environment in which some species of… — Jean-Baptiste Lamarck Copy Share Image
In every animal which has not passed the limit of its development, a more frequent and continuous use of any organ gradually strengthens, develops… — Jean-Baptiste Lamarck Copy Share Image
A sound Physics of the Earth should include all the primary considerations of the earth's atmosphere, of the characteristics and continual changes of the… — Jean-Baptiste Lamarck Copy Share Image
On our planet, all objects are subject to continual and inevitable changes which arise from the essential order of things. These changes take place… — Jean-Baptiste Lamarck Copy Share Image
All knowledge that is not the real product of observation, or of consequences deduced from observation, is entirely groundless and illusory. — Jean-Baptiste Lamarck Copy Share Image
“First Law In every animal which has not passed the limit of its development, a more frequent and continuous use of any organ gradually… — Jean-Baptiste Lamarck Copy Share Image
All the acquisitions or losses wrought by nature on individuals, through the influence of the environment in which their race has long been placed,… — Jean-Baptiste Lamarck Copy Share Image
