Why Time Zones Look So Weird on the Map!? CONTEXT: The Earth is divided into 24 time zones, but have you ever wondered why they look so strange and uneven on the world map? Time officially begins at the Prime Meridian in Greenwich, London, known as 0° longitude or 0 UTC (Coordinated Universal Time). Every region to the east of Greenwich adds hours (positive offsets), while regions to the west subtract hours (negative offsets). For example, if you’re in Los Angeles, your time zone is UTC -8. But

The ceramic pipes found at Pingliangtai, dating to around 2000 BCE, represent a sophisticated, coordinated urban project. This system wasn't for private bathrooms but for managing rainwater and wastewater across the entire walled settlement, showcasing centralized planning in a society without grandiose palaces or obvious ruling elites. For context, similar efforts appeared independently across the ancient world. In Mesopotamia around ~4000 BCE~, cities like Ur used clay sewer pipes for temples