London supermarket trials "payment by vein"
They allowed Russian political ads during election
Electric bus makes record 1,000 mile journey on single charge
Rumoured internet challenge creates hysteria in India
Cheaper copy-cat drugs could revolutionise cancer treatment
Robots could take 4m UK jobs within 10 years
China tightens cryptocurrency ban with new directive
Trump calls it "main recruitment tool" for terrorists
Study reveals consumer drones unlikely to cause serious injury
