Why The Next Mass Extinction May Already Be Here

Please Subscribe! There have been 5 mass extinctions on earth so far and many indicators show us that we may be in the throes of a 6th mass extinction now! Sources: National Health Statistics Reports: Mass Extinctions: Big Five Mass Extinction Events: Accelerated Modern Human - Induced Species Losses: Entering the Sixth Mass Extinction: Will Humans Survive the Sixth Great Extinction? TestTube Plus is built for enthusiastic science fans seeking out comprehensive conversations on the geeky topic