Google is calling its expanded Timelapse feature "the biggest update in years" to its Earth 3D mapping system. The tool allows you to overlay historical satellite photography on the 3D topographical maps, watching years of change to the landscape in just a few seconds. You can see dramatic shifts to populated cities, or the geological progression of waterways and landmasses. But of course the most obvious application of this tool is viewing climate change in a much more immediate way.

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