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  Science   19 Nov 2018

Science, 19 Nov 2018

NASA probe beams back image of Jupiter's moon Io

Slightly larger than Earth's moon, Io is the most volcanically active world in the solar system.

19 Nov 2018 2:07 PM

How much does a kilogram weigh?

Since 1889, a kilogram has been defined by a shiny lump of platinum-iridium kept in a special glass case.

19 Nov 2018 9:39 AM