Period Stenian Period

Time runs left (older) → right (younger) · Hover a card for details

Rodinia begins assembling (1200-1000 Ma).

1.20 Ga – 1.00 Ga · 200.00 Ma duration

Axis labels in Ma (millions of years ago) · Click a card for details

Stenian Period 1

1200 Ma First Sexual Reproduction Genetic mixing evolves Evidence in red algae fossils suggests sexual reproduction evolved, dramatically accelerating evolution.