All human babies can metabolise lactose, but only some adults can manage the trick.

ECONOMIST: Human evolution

Children metabolise drugs in a way that is quite different from adults.

ECONOMIST: Children's medicine

It was discovered ten years ago that AAPB produce refractory molecules when they metabolise sugars and L-amino acids, but it is only recently that the scale on which they do so has become apparent.

ECONOMIST: Bacteria and climate change