Electronic spectacles coming to market soon

(PhysOrg.com) -- US company PixelOptics has invented electronic spectacles that can automatically change focus as you lower your head to read a book, and could spell the end of the bifocal.

Water Planets

Of the roughly 420 extra-solar planets now known, about a dozen are in the newly named category of "super-earths," planets whose masses are in between of two and about fifteen earth-masses.

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