PhysicsHow to be in two places at the same time An ambitious experiment to make a glass sphere exist in two places at once could provide the most sensitive test of quantum theory yet ¿ìè¶ÌÊÓÆµ
LifeThe limits of knowledge: Things we'll never understand From the machinery of life to the fate of the cosmos, is there anything science can't explain? Yes, says Michael BrooksFeatures