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In 2021 we face many problems like global warming and the rise of sea level and both of those problems could impact animal life. For example, the rainforest poison dart frog could have a lot of color in it and its skin is smooth for swimming in water. But in about 1000 years the frog could get a totally new color like brown to match its new environment of sand and dead plants from the heat, and it would also have a more rugged texture to match sand. Also, the frog would not need to be in the water for as long because there is not a lot of water left and would only need to go to the water to reproduce like all frogs.