Saying 'Cheese' for More Effective Border Security

Facial recognition systems perform some very challenging tasks such as checking an individual’s photo against a database of known or suspected criminals. The task can become nearly impossible when the systems acquire poor ...

Phoenix Lander Winds Up Its Astonishing Summer On Mars

(PhysOrg.com) -- Mars has slipped far enough behind the sun today that signals from Mars-orbiting spacecraft are effectively blocked until mid-December. This solar conjunction happens every two years.

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