Recycling is tricky: just half a penny's worth of neodymium helps a mobile phone vibrate.

ECONOMIST: Rare earths and China

The lead changed hands several times in a see-saw first half before Kevin Penny's 37th-minute try sent the teams into the break level at 12-12.

BBC: Warrington 22-34 Huddersfield

This means that brokerage analysts have cut their second-half profit forecasts by a penny per share.

FORBES: Look Beyond Earnings Headlines

But when that data ends up on the open market, you may be surprised at the price it fetches: in this case, less than half a thousandth of a penny.

FORBES: Updated with a more recent comment from Facebook below.

The US Army-funded research seems promising but is obviously still in its infancy -- one of the designs the researchers demonstrated is half the size of a penny but pumps out 120dB of noise (about the same as a siren), while another bumped out over 135dB, (which is roughly equivalent to a jackhammer).

ENGADGET: Tiny thermoacoustic engines pave the way for screaming gadgets

But at least your penny-and-a-half of profit on the sales dollar comes with a scant dose of capital.

FORBES: At your service

Under U.S. securities law, PaineWebber may have to explain why it allowed a broker to place more than half of a retirement-age client's fortune in Canadian penny stocks.

FORBES: Ay, caramba!

He said of more than 200, 000 pensions paid outside the UK, more than half of them were to people who had "never put a penny" into the British system.

BBC: An elderly person with coins