Google Earth adds ocean discovery

Google Earth, the super-cool way to go where you can't afford, has just released version 5.0, which now allows users to dive beneath the surface of the ocean.

Google teamed with marine experts from National Geographic and the BBC to offer people underwater topography, points of interest and marine biology.

Version 5.0 also includes historical photos and imagery, so you can see how a place looked over time.

It's pretty cool stuff. And best of all, it's free!