– Museum am Schölerberg https://www.museum-am-schoelerberg.de/nda-uebersetzungen/wasser/evolution/9267-2/
1.6 billion years. That is the age of the oldest known fossils of complex single-celled organisms. They had a cell nucleus with genetic material and so-called
Roofdier en slachtoffer gingen een endosymbiose aan: ze werkten samen.