He’s a blogger, young by the sound of him, and actually helps us out — NOTHING of this kind — widespread, sudden extinction — has happened in modern times, despite claims that “whole taxa” will vanish because of chainsaws, Aquanet, cattle farts, etc etc. We will survive this, they will not.
What widespread, sudden extinction?
The article references mummies spread over many thousands of years and at least 14,000 years.
There is no particular reason to believe anything other than that there were a large number of separate events, in both time and space, that trapped the animals and killed them, after which some became mummified.