Facebook says the outage, which lasted nearly six hours, was caused by a configuration change.
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In a site near Reykjavik, geothermal energy is being used to create products rich in protein.
Microsoft’s latest operating system is being offered as a free upgrade from Tuesday.
Social media sites owned by Facebook were knocked offline on Monday, tracking sites showed.
Frances Haugen tells CBS that changing the algorithm would mean people spending less time on the site.