A team of researchers at Cardiff University has discovered stem cells in the cheek can be used to supress the immune system. It should help patients with certain types of diabetes, and those whose bodies reject organs after transplants.
It'll be several years before a treatment's developed but the scientists say it's a real breakthrough.
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John Charles scored more than a hundred goals for the club, and was known as the darling of Italian football
The Plaid leader urged voters to give her party a mandate, so that she can give Wales a voice in Parliament as the SNP has for Scotland.
90,000 people are expected to attend the youth festival, which runs from the 29th May to the 3rd June.