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Google has released a series of time-lapse images that show the massive changes that have occurred to certain areas of the Earth's surface roughly over the period 1984-2012.
The images show, year by year, the massive changes that have occurred to various areas of the planet, including Dubai's costal expansion, Las Vegas urban growth (1986-2012), Brazilian Amazon deforestation, Lake Urmia drying up, Wyoming coal-mining and the Columbia glacier retreat (for the purposes of animation this image changes on a bigger time-scale than year-by-year).
To create these animated images Google joined forces with the US Geological Survey, NASA and TIME magazine while Carnegie Mellon University's CREATE Lab built the HTML5 site that made the animations interactive and enables users to browse them.
The images are available to view on Google+ at https://plus.google.com/photos/+GoogleEarth/albums/5875822979804092129 and on Google Earth at http://earthengine.google.org/#intro/LasVegas.tb/kc