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NASA's Spitzer Space Telescope has revealed the first known system of seven Earth-size planets around a single star. Three of these planets are firmly located in the habitable zone, the area around the parent star where a rocky planet is most likely to have liquid water.

The discovery sets a new record for greatest number of habitable-zone planets found around a single star outside our solar system. All of these seven planets could have liquid water – key to life as we know it – under the right atmospheric conditions, but the chances are highest with the three in the habitable zone.

Scientists have gotten better at predicting where earthquakes will occur, but they’re still in the dark about when they will strike and how devastating they will be.

When deciding what crops to grow during a season, growers look at several factors. Do the crops have a good yield in their area? Does the area currently have the resources - usually water - to grow that crop? Will the crop give a return on the investment? And, what are the future effects that growing that crop might have on the grower’s fields?

The battery might be the least sexy piece of technology ever invented. The lack of glamour is especially conspicuous on the lower floors of MIT’s materials science department, where one lab devoted to building and testing the next world-changing energy storage device could easily be mistaken for a storage closet.

Hebrew University researchers describe how infectious bacteria sense they’re attached to intestinal cells and remodel their gene expression to exploit our cells and colonize our gut.