The cell was the first invention of the animal kingdom, and all higher animals are and must be cellular in structure. Our tissues were formed ages on ages ago; they have all persisted. Most of our organs are as old… — John M. Tyler Copy Share Image
Indeed, while Nature is wonderfully inventive of new structures, her conservatism in holding on to old ones is still more remarkable. In the ascending… — John M. Tyler Copy Share Image
The cell was the first invention of the animal kingdom, and all higher animals are and must be cellular in structure. Our tissues were… — John M. Tyler Copy Share Image
One of my friends, reading the title of these lectures [The Whence and Whither of Man] said: "Of man's origin you know nothing, of… — John M. Tyler Copy Share Image
![“One of my friends, reading the title of these lectures [The Whence and Whither of Man] said: "Of man's origin you know nothing, of his future you know less."” quote by John M. Tyler](https://sms4smile.com/quotes/img-quotes/0bf/john-m-tyler-75548_knowledge_one-of-my-friends-reading-the-title-of-t_2777704.jpg)