Going back in time with Google Earth

Google Earth has added a Wayback Machine of satellite images over the years. In the application, click the clock icon at the upper left. If there are multiple images available in that region, you'll get a sliding timeline that'll let you check them out. depending on where you're looking you may find images dating back as far as 1945, which you can step through shot by shot.

It's a nifty way of seeing how often your location of choice has been snapped by the birds and at what resolution. (Wow, remember when satellite images were black and white? Neither did we.) It's definitely a work in progress; in particular, areas with 3D views available don't seem to display correctly. And it's not half as cool as Superman flying backwards to spin the world the other way and turn back time -- if that could be done on behalf of our friends in, say, Jakarta or North Dakota, we have no doubt Google would. For now, though, enjoy the free time travel.