Google Earthís 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.
Itís 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 youíre 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. Maybe that last one is just us.
Why you need it
If you have children itís a must-have app: itís widely used in education and the ability to access all kinds of data and swoop and soar around the planet is just as exciting today as when we first experienced it just over a decade ago (and itís much more realistic).
And if you donít have children itís just as useful: you can watch real-time traffic flows and explore the potential effects of earthquakes, see entire cities in 3D and virtually visit places like Mount Everest. How amazing is that?