Ernst Haeckel: Pioneer of modern science
(PHYSorg.com Biology)

`By ecology, we understand the whole science of the organism`s relationship with the surrounding outside world, which includes in a broader sense all `existential conditions`. These are partly organic and partly inorganic in nature; both the former and the latter are, as we have previously shown, of utmost importance for the form of the organisms, because they force them to adapt to them.`