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And gravity is at the crux. Undergraduate students in the Department of Physics and Astronomy designed and built a sandbox where users can mold their own universe with sand and watch how gravity affects an object - a spacecraft or a comet, for example - as it travels through the imagined environment.

Analysts say the wind power sector has substantial potential in China during the next five years, and that there are also substantial opportunities for wind turbine makers at home and abroad.

And so what happens to mobile developers who build these apps is that they have to make this choice, they either have to build it the way they have been building it, which is really rich and computationally intensive, and then they can really only sell that to end users who have high-end hardware, which is a very small portion of the market segment. Or, if they want to reach the mass of end users, who have far less capable hardware, they have to water down the experiences. So, that is kind of an unhappy choice that app developers have to make.

Analysts said the official factory gauge's return to the expansion zone indicated that the decelerating economic growth has shown sign of stabilizing and that the business outlook is brightening.

And there’s always the baseline Kindle, which has a touchscreen but doesn’t include a light.