Lauren Kolesinskas for The New York Times writes that global warming is causing spring to arrive early and autumn to come late in many places, and not all species are adapting at the same rate.Every year, as the seasons change, a complex ballet unfolds around the world. Trees in the Northern Hemisphere leaf out in the spring as frost recedes. Caterpillars hatch to gorge on leaves. Bees and butterflies emerge to pollinate flowers. Birds leave the Southern Hemisphere and fly thousands of miles to lay eggs and feast on insects in the north. Read full article here.