>What changed ~15k years ago ... and why did it take 185k years to happen? ~15k years ago coincides about the with ice retreating at the end of the last glacia

>What changed ~15k years ago ... and why did it take 185k years to happen? ~15k years ago coincides about the with ice retreating at the end of the last glacial period. A large part of human history was too cold to farm. The last glacial period, popularly known as the Ice Age, was the most recent glacial period, which occurred from c. 110,000 – c. 11,700 years ago. https://en.wikipedia.org/wiki/Last_glacial_period https://en.wikipedia.org/wiki/Last_glacial_period