As Gordon Brown visits Saudi Arabia, the Observer's political columnist Andrew Rawnsley writes, 'Green politics matter now more than ever. It is not woolly to be green at this time. It has never been more hard-headed.' His piece ends, 'Green is better than good. It is smart.'
Blood vessel organoids quickly minimise damage to injured tissue
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Blood vessels grown in the lab in just five days could quickly prevent the
tissue damage that can occur after an accident
3 hours ago
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