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Publisher's Summary

In this issue:

"12 Events that will Change Everything": Certain natural and man-made events could happen at any time, completely transforming societies.

"Alzheimer's: Forestalling the Darkness": New techniques that could help combat Alzheimer's Disease.

"Is Time an Illusion?": The concept of time and change may emerge from a universe that, at root, is utterly static.

"Washing Carbon Out of the Air": Machines could one day absorb carbon dioxide from the atmosphere, reducing global warming.

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