The other two methods rely on specially shaped laser beams - instead of a beam whose intensity peaks at its centre and tails off gradually, the team is investigating two alternatives: solenoid beams and Bessel beams.

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Unlike earlier research, which often used video clips or other methods to simulate crimes and witnesses, the Illinois study was the first and only one to compare the two methods in the field using actual cases.

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Gamers (typically people that play StarCraft, Halo, Madden, Call of Duty, Mortal Kombat, and other fine video games) have the ability to compete via two methods: MLG Pro Circuit and Gamebattles.com.

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Two ways at least that is, who knows who will come up with other methods?

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The participants focused on two areas: improving Dr Agrawal's technique, and using similar methods to attack other problems in number theory.

ECONOMIST: Number theory