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Earth is currently in a period of cooling. Over the last decade, Earth's average temperature dropped about 0.7C. In the last decade, the rate of our world's warming deccelerated. Scientists can't predict that the globe will continue to warm over the course of the 21st century, as they again failed to predict our current cooling cycle. Is this warming trend a reason for concern? No. After all, our world has witnessed extreme warm periods before, such as during the time of the dinosaurs. It was also much warmer during the Holocene Maximum, around the Bronze Age, and polar bears adaptded.
It was much warmer during the Medieval Warm Period, and the polar bears adapted, while Man flourished. Earth has also seen numerous ice ages on roughly 18,000-year cycles for at least the last million years. So, change is perhaps the only constant in Earth's 4.5-billion-year history.
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