and riccardo reports from mexico that are hyperloop financed by iran must isn't planning it would make the trip from quite a lot harder to mexico city in just 40 minutes. if outlet is red white i mean i only think they. do you have a science question send it to us as a video text or voicemail if we answer it on the show we'll send you a little surprise as a thank you come on just ask. why does on line and on twitter and facebook this week's your a question comes from okello making a menu well in uganda. how do autonomous cars avoid accidents. an autonomous vehicle constantly monitors traffic with cameras and a variety of senses it's claimed they can recognize potential hazards and respond to them even better than a human driver can. a stereo camera detects road markings pedestrians and other road users. grade our sensors scan the road as far as 200 meters ahead of the car. and laser scans everything in 180 degree field of view. and ultrasonic senses measure the distance to houses and other cars using sound waves that bounce back off those objects. and they also draw on the latest digit