There have been FIVE documented extinction events long before any human impacts could be to blame. Note there were MILLIONS of years between them where species could have developed, animals we can only see thru fossilized remains left behind, amazing creatures all we are sure.
Top Five Extinctions
- Ordovician-silurian Extinction: 440 million years ago. Small marine organisms died out.
- Devonian Extinction: 365 million years ago. …
- Permian-triassic Extinction: 250 million years ago. …
- Triassic-jurassic Extinction: 210 million years ago. …
- Cretaceous-tertiary Extinction: 65 million Years Ago
So when we read of these looming extinction type potential events, remember this is familiar territory for earth, heinous as it sounds.