The Chicago team overcame this problem by activating the production of a body chemical called LIGHT within a tumour.
Now scientists - at the University of California, San Francisco, and Cincinnati Children's Hospital Medical Center - believe that body-penetrating light can alter the development of the eye, at least in mice.
This time, I took along a new Sony nex-5r, with a stunning 16 MP APS-C sensor, a small form-factor, and a light weight body.
In order to see light, the eye must absorb it, but in order for a person to be invisible, the body must not absorb any light.
Zinfandel - Zinfandel is a red wine with light to full body and berry-like or spicy flavors.
The body of ex-WBA light-middleweight champion Shaun Cummins was found in 10 pieces in freezers at his home in Marriott Road, Leicester, in September.
FIFA, world soccer's governing body, gave the green light to sponsor advertising for referees in domestic leagues in 2001, but it remains forbidden in FIFA competitions such as the World Cup.
The new iPod touch has been redesigned with a brilliant 4-inch Retina display in an ultra-thin and light anodized aluminum body-the thinnest iPod touch ever at just 6 mm thin and weighing just 88 grams.
Then she grabs two ski-pole-like handles, presses a button and waits as beams of light trace over her body.
Methods are already being developed to implant a light source inside the body which could be activated by remote control.
Even relatively small amounts of light can reset the body's internal clock, so find as dark an environment as possible when traveling.
As the first Ultra in the Series 7 family, the Series 7 Ultra embodies superior mobility and performance in an ultra-slim and light, full aluminum body.
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Mr Salmond emphasised further that there was "no room for complacency" within the Scottish body politic, especially in the light of the fact that Scotland's claimant count rose in August.
"It's not something subtle here, it's a major effect on the way the retina develops that requires light going through the body, " said Prof Richard Lang, from Cincinnati Children's Hospital.
There are a few props, like the blanket flooded with green light that covers the body of Lazarus as he slowly rises from the dead in a thrillingly suspenseful series of choreographed movements.
The highlight may prove to be a motion on the Membership of the Speaker's Committee on the Independent Parliamentary Standards Authority - the very light-touch oversight body which appoints the officials who run the MPs expenses watchdog.
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These findings are not surprising in light of the growing body of evidence linking intake of sugar sweetened beverages -- of which soda makes up the largest percentage -- and diseases such as diabetes, heart disease, obesity and high cholesterol.
However, a paper to be presented at a security conference held under the auspices of the Institute of Electrical and Electronics Engineers, a New York-based professional body, in May, sheds some light.
"I think it is right that the body whose job it is to shine a light on policing and the police force should be independent of government and of the service, " Mrs May added.
An AF Assist Light is provided on the camera body to optimize focusing accuracy in the dark, while the Face Recognition AF function automatically detects up to 12 faces and pinpoints the focus on a main subject.
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You don't have to be a bodybuilder though -- light weights or even using your own body weight for resistance is enough for beginners.
Angela Owen's crime came to light after her baby boy's body was found by workmen renovating a 350-year-old house near Halifax, West Yorkshire, in 2006.
The power needed to run such a small chip is so low that it could be done off stray light in a room, or even body heat.
The body harness and head strap had to be as light and unobtrusive as possible too - no mean feat when dogs come in different shapes and sizes, even within breeds.
Using the least amount of light possible to get around helps avoid disturbing the body's circadian clock.
She began to fill her lectures with tales of her out-of-the body experiences, including travelling through space at the speed of light.
"Luckily, we had decided that we were going to wear body armour and helmets because we were going in at first light and it was still quite cool, " he said.
When Woodside, California, mom Dana Sanderson asked her daughter Kit, then 6, what would help her sleep alone, Kit decided she needed a bigger night-light and a "Mommy pillow, " a body pillow with her mom's image traced in fabric paint.
Avoiding light at certain hours also is important to help the body clock reset.
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