Even if humans manage to kill off most life on Earth it will continue to exist, propagate, and become more complex. Again we’re talking about billions of years. There have been huge shifts in climate and mass extinctions many times before and yet here we are.
So I took it to mean all life on Earth being dead. As long as one microbe survives to reproduce and start evolving it doesn’t count.
Going a couple comments up the chain:
So I took it to mean all life on Earth being dead. As long as one microbe survives to reproduce and start evolving it doesn’t count.