Death zone in the Himalayas and the world's first city

Above 8000 m begins the death zone. 9400 m is the level at which a person without oxygen loses consciousness in minutes. The number of ultimate altitudes.

Around 7400 BC (≈9400 years ago), Çatalhöyük in Anatolia was one of the world's largest settlements — up to 10,000 inhabitants. A contender for history's first city.

9+4+0+0=13→4. Transformation leads to foundation, and two trailing zeros — double silence after the transition. A number that passed through change and froze in stillness.