LifeBiology's 'dark matter' hints at fourth domain of life Over 99 per cent of organisms remain unknown to science – so could some of them sit outside the classic three domains of cellular life? ¿ìè¶ÌÊÓÆµ
HealthAbnormalities discovered in stem cells from adults Mistakes in the chromosome of adult stem cells have been identified, raising fears that tissues made from them would also be abnormal ¿ìè¶ÌÊÓÆµ