Laptops, smartphones and Apple's new iPad are shining bright light into our eyes until just before we doze off. Now there's growing concern that these glowing gadgets may actually fool our brains into thinking it's daytime.http://feeds.feedburner.com/~ff/rss/...?d=yIl2AUoC8zA http://feeds.feedburner.com/~ff/rss/...?d=7Q72WNTAKBA http://feeds.feedburner.com/~ff/rss/...88:V_sGLiPBpWU http://feeds.feedburner.com/~ff/rss/...?d=qj6IDK7rITs http://feeds.feedburner.com/~ff/rss/...88:gIN9vFwOqvQ
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