Viewing the photos sent back from NASA’s Mars Curiosity mobile science laboratory has been exciting over the last week, but here’s one with a twist… and a roll. Open this link on an iOS device that contains a gyroscope sensor — like the iPad 2 and third-generation iPad, iPhone 4 and 4S, and fourth-generation iPod touch — and navigate the panorama by tilting and moving the device. (Bonus points for scanning the horizon while you’re sitting in a swivel chair!) follow link
Type Faster on an iPhone or iPod touch
When typing on an iPhone or iPod touch, to end a sentence quickly and get ready to start the next one, double tap the Space bar. You'll insert a period followed by a space. You can turn this shortcut on or off via the Shortcut slider in Settings > General > Keyboard.
View Mars Panorama Using a Gyro-Enabled iOS Device