HealthBabies made using three people's DNA are free of hereditary disease Eight children have been born in the UK using genetic material from three people, which appears to have prevented them from developing serious genetic conditions ¿ìè¶ÌÊÓÆµ
MathematicsComplex knots can actually be easier to untie than simple ones Mathematicians have solved a decades-old problem in knot theory, discovering that linking two knots together can actually produce a knot that is easier to untie – the opposite of what was expected ¿ìè¶ÌÊÓÆµ