Live updates as Crimea votes on whether to rejoin Russia in a Moscow-backed referendum, which Kiev and the West have condemned as illegal.
Malaysian officials say 25 countries over a vast arc of Asia are now helping in the increasingly complex search for missing flight MH370.
Chinese e-commerce giant Alibaba announces plans for a flotation in the US, saying the move will make it "a more global company".
A new system called Spritz claims to enable users to take in a huge amount of information at a time. But does it damage the volume of knowledge we retain?
Can maths lead to better matchmaking? Hannah Fry shows you how knowing your numbers can help you in the internet romance game.
This page is best viewed in an up-to-date web browser with style sheets (CSS) enabled. While you will be able to view the content of this page in your current browser, you will not be able to get the full visual experience. Please consider upgrading your browser software or enabling style sheets (CSS) if you are able to do so.