Jorg Piringer releases Gravity Clock for Mac 3.0. Gravity Clock combines a physics simulator with a minimalist clock design to create the 21st century successor of an hour glass. It not only shows the current time but also visualizes the passage of time in a tangible way by the permanent destruction and reconstruction of the clock face. Every second the hand breaks numbers out of the dial and lets them drop to the floor. Gravity Clock for Mac 3.0 is $0.99 and can be downloaded from Mac App Store.