AN ALZHEIMER’S marker in fluid drawn from the spine can reveal early signs of the disease in healthy adults years before any symptoms appear, research suggests.

Britain’s decision to allow couples to screen embryos for possible cancer genes has highlighted the vastly different practice in the US and revived calls for global agreement on the issue.

Scientists have cloned human embryos for the first time using immature eggs matured in a dish – a technique that may help cloning become a viable option for growing patients’ own replacement tissue to treat diseases.

Eight hundred students at a Belgian university must sit exams again because the answers were handed out with the questions.