In the late 1980s, as the world’s governments were waking up to the problem of climate change, the mud at the bottom of the ocean near Antarctica revealed a surprise. Earth had lived through rapid global warming before. Image: tauntingpanda
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A spell of severe global warming 55 million years ago was triggered by not one but two injections of greenhouse gases into the atmosphere—and the rate of increase suggests that the ancient warming event may hold important lessons for what to expect with today’s climate change. Image: NASA Earth Observatory
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Two geologists claim they have evidence that carbon dioxide levels in Earth’s atmosphere more than doubled in a single year at the end of the Palaeocene. The increase helped trigger the most extreme change in surface temperatures since dinosaurs ruled the land. The speed of the change makes an extraterrestrial impact the likely cause, they say. Image: Space Art
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