Accounts Quote by Charles Darwin

“As the species of the same genus usually have, though by no means invariably, much similarity in habits and constitution, and always in structure,…

— Charles Darwin

It is not always the magnitude of the differences observed between species that must determine specific distinctions, but the constant preservation of those differences…

— Jean-Baptiste Lamarck

I'd bet almost anything that life from another planet, if formed independently from life on Earth, would be more different from all species of…

— Neil deGrasse Tyson

If we look round the world, there seem to be not above six distinct varieties in the human species, each of which is strongly…

— Oliver Goldsmith

Not one change of species into another is on record ... we cannot prove that a single species has been changed.

— Charles Darwin

Of course he would count the time that we'd been two entirely different species.

— Maggie Stiefvater

To such an extent does nature delight and abound in variety that among her trees there is not one plant to be found which…

— Leonardo da Vinci

Now when naturalists observe a close agreement in numerous small details of habits, tastes and dispositions between two or more domestic races, or between…

— Charles Darwin

That the variability of an organism to a certain extent is a constant and certain condition of life we admit, otherwise there would be…

— Richard Owen

Without argument the species would parish.

— Gerry Spence

Unfortunately, with dinosaurs, we haven't had enough specimens to determine how much variation there is within a species.

— Jack Horner

If a species is diverse, it can survive and prosper. If a species is homogeneous, it is vulnerable.

— Richard Koch