Ordovician–Silurian extinction
~443 mya · Event
First of the 'Big Five' mass extinctions; about 85% of marine species die out.
On these timelines: Master
Around 443000000 BCE
- First land plants (425000000 BCE)
~443 mya · Event
First of the 'Big Five' mass extinctions; about 85% of marine species die out.
On these timelines: Master