You don't need a global catastrophe for species extinctions. Millions of species have probably gone extinct just because they got out-competed by another speci

You don't need a global catastrophe for species extinctions. Millions of species have probably gone extinct just because they got out-competed by another species. If you believe in evolution you also have to believe in natural extinction, because species don't just adapt to be optimal, they adapt to survive, and that doesn't always work.