The robot that can swim and fly and other tech news

BBC Click's Marc Cieslak looks at some of the best of the week's technology news stories, including:

  • Nissan demonstrates the sound its electric cars will make following a US ruling they must make a noise for safety reasons

  • Amazon proposes a system that will allow them to access people's homes to deliver parcels

  • A robot that can swim and fly - the developers hope the technology could be developed for search and rescue robots

See more at Click's website and @BBCClick.