If You You Are Black And Have a Wide Nose — DNA Finally Revealed Where It Really Comes From

The wide nose is the ancestral human trait, originating from the first anatomically modern humans in Africa approximately 300,000 years ago, and was shaped by climate adaptation through Thompson's nose rule, which explains that wide noses evolved in hot, humid climates for efficient cooling and gas exchange, while narrow noses developed later in cold climates for air warming and humidification; genetic research has identified specific genes (GLI3, DCHS2, PAX1, and RUNX2) that control nose shape, with the wide nose variants being the ancestral versions that all humans originally carried before migrating out of Africa around 60,000 years ago.