english: The differences are what interest me, because the one on the left was made to a pretty unvarying design for about a million years -- from one-and-a-half million years ago to half a million years ago.
non_english: Mňa však zaujímajú odlišnosti. Pretože predmet vľavo sa vyrábal s nepatrnými zmenami dizajnu viac ako jeden milión rokov, v rozpätí pred 1 500 000 – 500 000 rokmi.