Which countries are having talks over gas prices?

Ukrainian politicians claim there are political motives behind the price rise originally demanded by the Russian energy giant Gazprom. They say Russia is offering much more favorable terms to other former Soviet Republics. Russian officials insist it’s a purely commercial matter.

Scientists have known for some time that a severely reduced food intake makes some animals live longer. Now, researchers are getting closer to understanding why. They say the finding may also lead to a similar understanding in people, and a treatment for diseases like diabetes.