HumansWill DNA profiling fuel prejudice? Keeping samples taken from innocent people helps to catch more criminals, but civil liberties may be the price ¿ìè¶ÌÊÓÆµ
TechnologyColour profile exposes faked or stolen gems A new technique dubbed "microspectrometry" could provide the long sought-after way of establishing a gemstone's type and quality – and spot fakes ¿ìè¶ÌÊÓÆµ