Typhoon. Flood. Hurricane. Tornado. Earthquake. Fire. Tsunami . So far what is the single greatest disaster that has afflicted earth since records have been kept?

There are some dinosaurs out there enraged that your forgot asteroid impacts. 

 Noah's flood was a real b*tch. Killed 99.9999999999999999999999999 % of all living animals. 

ignorance of the inhabitants

Mea culpa. How do I beg their forgiveness being as how they no longer exist? Is there an internet link between the present and the past? Thank you for your reply char. You will see a question that your reply caused! Thanks.

Thank you for your reply bh! :)

Touche! Thank you for your reply Baba and Happy Tuesday! :)