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Tourists who drift aimlessly during a sightseeing tour are moving randomly - just like electrons that move from one atom to the next. To obtain a better understanding of these random motions it is often useful to reduce their complexity. Physicists do this by simulating random walks

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Some go to school to become journalists. Others hit the road with a notebook, camera and insatiable curiosity, while others have a shocking moment of awareness of the complexity of the human condition and want to document it.

A plan to plant flowers to clean up radiation in Japan isn't as crazy as it sounds. A young Japanese entrepreneur is trying to convince people to sow sunflower seeds in Fukushima Prefecture, intending the plants to cleanse the soil of radioactive contamination.