HealthSlower arm speed may be why older people fall more easily after a slip Younger people move their arms more quickly than their older counterparts when they slip, helping them to regain their balance and prevent a fall ¿ìè¶ÌÊÓÆµ
HealthThe development of embryos may be less shaped by genes than we thought The chemical reactions in cells appear to shape an embryo's development, possibly overriding the effect of genes ¿ìè¶ÌÊÓÆµ