Our weekly news round-up: Cassini radar images of transient lake features on Titan put down to bubbling hydrocarbon reactions; Hackers target iCloud, demand ransom from Apple; The real reasons the US and UK have banned laptops on flights from North Africa and the Middle East; US bill to allow ISPs to on-sell your private data to marketers; Google reinstates location sharing feature on Android; 15% of Twitter users are bots - CEO Jack Dorsey faces pressure to resign; Uber suspends its self-driving car program over safety concerns.