english: And when you look at those tiny green algae on the right of the slide here, they are the direct descendants of those who have been pumping oxygen a billion years ago in the atmosphere of the Earth.
non_english: Tie maličké zelené riasy vpravo na snímke  sú priami potomkovia rias, ktoré pred miliardou rokov  pumpovali do atmosféry Zeme kyslík.