twoheadedboy writes: "Having introduced mobile adverts in March in an effort to monetise its mobile user base, Facebook has now opened the doors for developers to add advertise their apps on users' feeds. The social network will hope the announcement will appease those concerned about advertising revenues. Although more than half of Facebook’s 900 million users access the site through a mobile device, none of its $3.15 billion (£2 billion) in advertising revenue comes from mobile adverts."
Today's scientific question is: What in the world is electricity?
And where does it go after it leaves the toaster?
-- Dave Barry, "What is Electricity?"