Natural disasters have the greatest ability to destroy the majority of life on the planet; they can be both universal and human caused events where a region or regions of the world become dangerous or inhospitable to life.
“Even with all our technology and the inventions that make modern life so much easier than it once was, it takes just one big natural disaster to wipe all that away and remind us that, here on Earth, we’re still at the mercy of nature.” - Neil deGrasse Tyson (1958 - Present)
“Today we’re living through the sixth great extinction, known as the Holocene extinction event. The rate of this extinction is nothing short of explosive and terrifying. The current rate of extinction is 100 times to 10,000 times the background rate (the average between extinctions.) It is estimated that between 2.7 and 270 species are erased from existence every day. Including today. At our present course over half of all plant and animal species will be extinct by 2100.” - The Independent
Climate change, massive lava flows, super volcanoes, solar flares, asteroid collisions and disease; all of these have the ability to cause mass extinctions on the planet.
“Climate change is the primary contributor to our current mass extinction; the other major human induced contributors are habitat degradation, overexploitation, agricultural monocultures, and human-borne invasive species.” - The Independent
Hurricanes, volcano eruptions, mega tsunamis, draughts, and flooding.