A U.S. company that supplies meat to some of the world's largest fast-food chains in China has pulled all its products made by a Chinese subsidiary, after reports that it was selling expired products.
The food safety scandal that erupted in China in the last week has also spread overseas, affecting chain restaurants in Japan and Hong Kong, and prompted calls for tighter food safety regulation in China.
Basic biology has it that girls are girls because they have two X chromosomes — the things inside cells that carry our genes. Boys are boys because they have one X and one Y. Recently, though, there's been a lot of debate in scientific circles about the fate of that Y chromosome — the genetic basis of maleness.