In 2001 – Wikipedia, the free Wiki content encyclopedia, went online as a feeder project for Nupedia, an expert-written online encyclopedia.
In 2005 – Thanks to a solar flare, ESA’s SMART-1 lunar orbiter discovered calcium, aluminium, silicon and iron – in Mare Crisium on the moon.
In 2013 – Facebook announced its ‘Graph Search’ improvements to internal search and recommendations.
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