Something new (to me at least) from Google Earth – they’ve wrapped the earth in a series of old maps, such as Tokyo in 1680, New York in 1836 or the world in 1790 (below). Zooming and all the other functions of Google Earth seem to work fine, though obviously the maps aren’t necessarily perfect as they only had steam-powered GPS back then.

To view the maps go to the palette bar thingy on the left of Google Earth, then under ‘Layers’ choose ‘Featured Content’, ‘Rumsey Historical Maps’ and take your pick. As you’re zooming around be patient – the progress indicator at the bottom of the app seems to say 100% some time before the maps show their full detail.