The Vision of the Past

action already animal appearance become beginning biological birth branches called certain characteristics complexity connected consciousness considered continuous course definitely direction discover earth effect elements essential everything evolution evolutionary example existence experience explain expressed extend eyes face fact finally follow forces fundamental future give gradually growing hand human idea importance increasing individual infinitely isolated least less lines living longer look mass material matter means mind mountains movement natural object observe once organic origin past perhaps phenomena phenomenon phyla physical position possible precisely present progress question races reached reality realm reason recognize remains represents result scientific scientists seems sense simple single sort speciation species structure successive theory things thought tion transformism transformist true understand unity universe vast whole zoological