Let us beware of saying that death is the opposite of life. The living being is only a species of the dead, and a very rare species. Friedrich Nietzsche
Living wild species are like a library of books still unread. Our heedless destruction of them is akin to burning the library without ever having read its books. John Dingell
Long after this wonderful event in the Earth's history, when the human species was spread over a good deal of Asia, Europe, and Africa, migration to the American continents began in attempts to find new feeding grounds and unoccupied areas for hunting and fishing. Harry Johnston
Measles and TB evolved from diseases of our cattle, influenza from a disease of pigs, and smallpox possibly from a disease of camels. The Americas had very few native domesticated animal species from which humans could acquire such diseases. Jared Diamond
Moreover, all our knowledge of organic remains teaches us, that species have a definite existence, and a centralization in geological time as well as in geographical space, and that no species is repeated in time. Edward Forbes
Moreover, the concern of some that moving DNA among species would breach customary breeding barriers and have profound effects on natural evolutionary processes has substantially disappeared as the science revealed that such exchanges occur in nature.
Paul Berg
Moreover, the concern of some that moving DNA among species would breach customary breeding barriers and have profound effects on natural evolutionary processes has substantially disappeared as the science revealed that such exchanges occur in nature. Paul Berg
Most of them are doomed to rapid extinction, but a few may make evolutionary inventions, such as physiological, ecological, or behavioral innovations that give these species improved competitive potential. Ernst Mayr
My first attempts to transmit typhus to laboratory animals, including the smaller species of monkeys, had failed, as had those of my predecessors, for reasons which I can easily supply today. Charles Jules Henry Nicole
Of all the species of literary composition, perhaps biography is the most delightful. The attention concentrated on one individual gives a unity to the materials of which it is composed, which is wanting in general history. Robert Hall
Our species is on the verge of changes that will fundamentally alter what it means to be human... and we are the people driving that change. Daniel Keys Moran
