Global Warming & Extinction Cycle

[Alpine]

This question has been orbiting my mind for a long time now.Is global warming a part of extinction cycle.I mean like dinosaurs and the ice-age animals are we too going to extinct and be succeeded by another more advanced and evolved species?

 

I mean it is possible...it has happened before.To be honest now I'm actually starting to believe that all the earlier extinctions happened due to Global Warming.

 

For e.g. The Earth heats up and the life ends on the planet.Then the gases evolved from the volcano ( sulphur I suppose) blankets the atmosphere and triggers an ice age.Could it happen?

Because if it can, then there are probably microscopic organism that live or can survive in volcano or the core of the Earth too because otherwise the formation of life would not be possible if there aren't any.

 

I know I'm jumping from subject to subject, but I'm just too curious B)