The Twins Paradox and the speed of light

"Scientists have found that, when twins are orbiting a massive object, time dilation can cause the accelerated twin to be older if that twin is moving slower than the other twin; in this case, velocity is the deciding factor of age, and the twin with the greater velocity is younger."http://www.physorg.com/news163738003.htmlI guess this just goes to prove how difficult facts in cosmology are to pin down and how ambiguous the whole concept is.

Hmmmm I always thought it was a fact. One twin gets on a spaceship which goes at the speed of light the other one stays home. When the spaceship returns the twin that stayed at home is older. FACT! At least I thought it was. Owell I still have alot to learn then.