According to research released today by Kaiser Permanente, the bottles of vitamin D on drugstore shelves may not contain nearly as much actual active vitamin as they say they do.

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While that becomes about the same 12 minutes if you divide by Facebook's 900 million users, remember that we're talking about active users here, so Facebook's actual engagement is actually much higher.

CNN: Google+ creator: Don't call it a social network

Global warming advocates have responded, in turn, that while the sun has indeed been more active in the last half of the century, the actual percentage change in solar irradiance is tiny, and hardly seems large enough to explain measured increases in temperatures and ocean heat content.

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Google Ventures has some auto experience, having backed RelayRides, which provides sharing of actual cars rather than rides, while its parent company Google has been active with auto-driving cars.

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