After the blogs written before, we know that the "big five" events have destroyed more than 50% to 95% of all organisms that have ever lived on Earth. Here is a video that gives a conclusion of all "big five" events and leads us back to the ancient time.
This trip made me to think about our current situation carefully. As most of the speculations about what causes a mass extinction are related to the climate change, it is a dangerous signal for us that the concentration of CO2 is rising rapidly and the global temperature is getting higher and higher in recent years.
Are we causing the sixth mass extinction?
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