The development of the Vertebrate proceeds from an axis upward, in two layers, which coalesce at the edges, and also downward, in two layers, which likewise coalesce at the edges. Thus two main tubes are formed, one above the other.… — Karl Ernst von Baer Copy Share
The distinguishing of the strata, or layers, in the embryonic membrane was a turning-point in the study of the history of evolution, and placed later researches in their proper light. A division of the (disc-shaped) embryo into an animal and a plastic part first takes place. In the lower part (the plastic or vegetative layer) are a serous and a… — Karl Ernst von Baer Copy Share
The development of the Vertebrate proceeds from an axis upward, in two layers, which coalesce at the edges, and also downward, in two layers, which likewise coalesce at the edges. Thus two main tubes are formed, one above the other. During the formation of these, the embryo separates into strata, so that the two main tubes are composed of subordinate… — Karl Ernst von Baer Copy Share
The History of Evolution is the real source of light in the investigation of organic bodies. It is applicable at every step, and all… — Karl Ernst von Baer Copy Share Image
Know thyself! This is the source of all wisdom, said the great thinkers of the past, and the sentence was written in golden letters… — Karl Ernst von Baer Copy Share Image
All new ideas pass through three stages: first they are dismissed as nonsense, then they are rejected as being against religion and finally they… — Karl Ernst von Baer Copy Share Image
