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​If you enjoy moving your hands as if you're conducting a piece of music that you like, then SoundTracer may be right up your alley. The experimental new iOS app allows you to find a song within a digital library, by "drawing" that music in the air with your phone.

A new forensics device can probe the soil for telltale gases that indicate the presence of buried bodies.

Researchers at the University of Missouri are developing software that would enable computers to perform video analysis tasks, such as alerting emergency services if a video surveillance camera detects a person falling and not getting up.