The engine then acts like a wireless access point, spraying water--or data--wherever it's needed.

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It is possible that there is a ring of steel just out of shot, but it seems that the students only close in on the police after the pepper spraying, rather than before, and then pull back voluntarily to allow the officers to reach the safety of their support.

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This involves shredding all of an organism's genetic material into pieces in one go by spraying it through a fine nozzle, and then sequencing the pieces without knowing where they came from.

ECONOMIST: Fruit-fly genetics

If such a policy means not letting even small delinquencies such as spraying graffiti that defaces public property go unpunished, then it has never been adopted, never mind enforced, in France.

ECONOMIST: The roots of discord

It quickly established its mastery of the new media ecosystem with a video hoax that showed designer Marc Ecko spraying graffiti on Air Force One, one of the first instances of viral marketing on YouTube, then only a year old.

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