Tag it, smell it
Graffiti artists, beware. Trains in Sydney, Australia, can now smell when you are up to no good. An undisclosed number have been fitted with electronic chemical sensors that can detect the vapours emitted by spray paint and permanent markers. When the sensors pick up a suspicious smell, live CCTV in the train sends images directly to security staff. So far, more than 30 people have been apprehended, say police.
鈥淭his may go down in history as the 鈥榠t鈥檚 not our fault鈥� study鈥�
Internet researcher Christian Sandvig on Facebook鈥檚 paper in Science, which claims that individual choices 鈥� rather than its algorithms 鈥� create the 鈥渇ilter bubble鈥� effect, which governs what a user sees and doesn鈥檛 see on social media
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Virtual reality on sale
It鈥檚 almost time for everyone to get immersive. Oculus Rift says its consumer virtual reality headset will go on sale in early 2016. Details, including the price, are scant. Oculus says the consumer version, based on recent prototypes, is lighter than the developers鈥� kits. It will also have an improved tracking system that will allow wearers to sit or stand while immersed in another world.
