Google Earth’s name is a little misleading these days, because in addition to modelling the entire world, it also enables you to explore bits of the moon and Mars.
It’s an astonishing technological feat, and its uses are almost endless: you can use it to explore far-flung places or see the ocean floor; you can see the effects of natural disasters or use it to identify places to visit when you’re travelling somewhere; you can use it as an educational tool or just load up on Sunny Delight, sit really close to the screen and imagine you can fly.