The tiny forest lives atop an old landfill in the city of Cambridge, Massachusetts. Although it is still a baby, it’s already acting quite a bit older than its actual age, which is just shy of 2. Its aspens are growing at twice the speed normally expected, with fragrant sumac and tulip trees racing to catch up. It has absorbed stormwater without washing out, suppressed many weeds and stayed lush throughout last year’s drought. The little forest managed all this because of its enriched soil and d