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Help me

, all cellphones sold in India will have a panic button to alert emergency services. The Indian government, which made the announcement last week, wants to make the country safer for women: sexual violence is rife and four rapes take place every hour.

30%

– discovered by Jonathon Penney at the University of Toronto – following news in 2013 that the US National Security Agency was monitoring our web activity

Brain racing

. On 22 April the University of Florida held a drone race with a difference. Instead of zipping around a course at 100 kilometres an hour, the small craft jerked erratically as they inched towards the finish. How so? They were being controlled by brain-computer interfaces that monitored electrical activity in the pilots’ brains. To get the drones moving, the pilots had to think about edging something forward – such as pushing a chair across the floor.