The ultrasound tech squirts gel on her belly, the expectant mom looks at the beating heart on the flickering screen, and a dozen friends and family members huddle in for a closer look -- drinks in hand.

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In the capital, Santiago, hundreds wept and embraced as they watched the rescue on a flickering big screen TV set up in a square.

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And its findings may pave the way for programme makers and game designers to eliminate dangerous flickering from the screen.

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Instead of the usual dreary Windows logo, the screen showed only a big blurry blue mess that was soon covered with giant, flickering icons.

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