"Einstein's theory of general relativity tells us that mass bends space and time, so when light comes toward us through the Universe, if it passes some dark matter, its light gets bent and the image we see gets bent and distorted, " Dr Heymans told the meeting.

BBC: Dark matter hints in widest-yet view of dark mystery

When it comes to light, the company that commissioned it is usually deeply embarrassed, and tries to disown the investigators it has employed.

BBC: I spy with my private eye.....

The laser light dims within seconds when the plastic comes into contact with even the tiniest emission of vapour.

BBC: Plastic lasers shed light on hidden explosives

When information regarding conflicts finally comes to light, we can assure you some consultants and funds are in for a rude awakening.

FORBES: SEC Scrutiny of Pension Consultants: A Call To Action (February 28, 2004 )

Most BlackBerry phones have a flashing light that blinks when an e-mail comes in, and a built-in option to filter alerts so that you only receive them from contacts you prioritise.

BBC: Managing e-mail while on the road

When it comes to policy, Mr Zuma travels light.

ECONOMIST: South Africa's election

While Angela Merkel has proved to be no margaret Thatcher on economics, she's light-years ahead of too many British pols when it comes to addressing the importance of fighting terrorists and strengthening ties with Washington.

FORBES: Fact and Comment

Queen Rania may be light-hearted in some of her approaches, but she is very serious when it comes to revitalizing education in the Middle East.

CNN: Queen Rania most inspirational leader of 2008

It comes loaded with five sensors which intelligently determine when to take a photos based on changes in light, motion, direction, colour and temperature.

BBC: Wearable tech pioneers aim to track and augment our lives