The Mystery of Life

ability According acid action activity actual animals answer appearance approach arose assumed attempt basic basis become beliefs body cause cell certain chaos characteristic chemical claimed complex compounds conception conclusions consciousness considered contained continually created creatures crystal define definition direction discoveries early earth elements energy essence eternal evolution existence experience explain fact force function further gene germs given greater held human ideas inanimate individual inorganic knowledge laws light living organisms logical machine man's material matter meaning mechanism mechanistic merely mind nature never notions objects observed occur origin Perhaps phenomena philosophy physical position possible present principle problem produce properties reason regarding religious remain represented reproduction scientific seems sense similar solution soon spontaneous structure substances theory things thought tion truth understand unique universe usually valid vital whole