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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A survey into inappropriate behaviour questioned Assembly members and people who work either for individual AMs or the Assembly as a whole.
With breaks in the cloud this afternoon allowing the sunshine to shine through, pollen levels will rise to very high today.
It'll be humid and rather cloudy today, with some drizzle at times, mainly to the west of the mountains.