According to internet conspiracy theorists, the giants of the tech world are using the microphones on our smartphones to listen in to our conversations and then deploy mysterious algorithms to work out what we want. Photograph: iStock

Have you ever been targeted by an ad for a particular product on social media just moments after you mentioned that exact product in a conversation wi(...)

Brothers  Brahim El Bakraoui (left) and Khalid El Bakraoui, identified as two of the suicide bombers in the Brussels attacks. Experts warned that extremists were trying to recruit entire families in Europe, portending the possibility of yet another evolution in jihadism. Photograph: EPA/Interpol

The identification of Khalid and Ibrahim El Bakraoui as suicide bombers in the deadly Brussels attacks is confronting investigators and counterterror(...)