A microscopic Mona Lisa from 'DNA origami' and other news
BBC Click's Lara Lewington looks at some of the best of the week's technology stories including:
A new chat app from Facebook for children under the age of 13
Nissan announced plans to launch robot taxis in Japan
The Mona Lisa has been recreated on a microscopic scale using a process called DNA origami
See more at Click's website and @BBCClick, external.