The Rungrado 1st of May Stadium is the world’s largest stadium. It has the capacity to seat 150,000 people and features a field measuring 207,000 square meters. It was completed in 1989, and is used as a venue for staging sporting events, but is known best for the Arirang Festival, a gymnastic and artistic showcase.
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Biston betularia - The peppered moth is a prime example of natural selection at work. Prior to the industrial revolution, the peppered moth was primarily light colored to match the bark of the trees they sought out for shelter. The trees began to darken from the loss of lichens caused by industrial soot, The lighter colored moth populations declined through predation while the darker moths thrived. When stricter air pollution standards were set, it allowed the lighter colored moths to make a remarkable comeback.
