Originally published on Ensia. Try navigating the soggy, waterlogged slopes of Kenya’s largest slum, with its hundreds of thousands of ramshackle houses, and you’ll quickly realize why Kibera is named after a Nubian word meaning “jungle.” Pasted and propped along the banks of the Nairobi River in Kenya’s capital, Kibera’s illegally constructed houses are packed together so densely you can barely see a sliver of the red dirt holding them up. Though estimates vary greatly,…