Well, it turns out there is an April Fools Joke in Google Earth today after all! If you turn on the “Geographic Web” layer and then zoom all the way out (38000+ miles away from Earth) the Earth’s continents merge into the theoretical Pangea (the way the continents may have appeared hundreds of millions of years ago). Here’s a screen shot:
UPDATE April 3rd: Google took down this little joke on April 2nd. So, a lot of people didn’t get to see it. Fortunately, I managed to capture a little video clip of it in action. Here’s your chance to see what it looked like:
(Click here for higher quality version)
By the way, for a full animation showing the merging of the continents on Google Earth, check out this cool paleogeographic time animation by Valery Hronusov.