"As much as it's an effective, common-sense source of some sustainable electricity, it's also a great way for people to engage with the issue of sustainability ... to feel like they are part of the solution in a very immediate, fun and visual way that doesn't make you do anything you wouldn't already be doing, " said Miller.

CNN: Green sidewalk makes electricity -- one footstep at a time

It may also be no coincidence that the testing of amateurs is well under way in Florida, home to countless anti-aging clinics that are a common source of testosterone and other performance-enhancing drugs.

WSJ: Cycling's Minor Leagues of Doping

For non-celebrities, the more common source of fake followers are spam bots which follow users in order to elicit a reciprocal follow, which then allows them to send spammy, direct messages to the Tweeter.

FORBES: Which Startup Bloggers Have The Most Legitimate Twitter Followers?

In 2006, two-fifths or 40% of all working mothers relied on informal childcare, with grandparents being the most common source for a third of parents.

BBC: 'End of nuclear family' forecast