Launch delay

The launch of Atlantis is on hold due a problem with the coolant pump on one of the fuel cells. As a side note, an elegant sustainable design feature on the shuttle is found in the fuel cell/life support systems (the current anomaly notwithstanding) – the water byproduct from the hydrogen/oxygen reaction is used by the astronauts on-orbit. It saves on launch mass and serves as a good reminder of how sustainability is key for space exploration. So do your part for the space program – design and test efficient systems :)