Our weekly news round-up: Tencent and Alibaba look like becoming trillion dollar companies, dominating 770 million Chinese internet users; Curiosity rover resumes onboard rock sample analysis after 18 month hiatus; Cryosleep chamber under development by NASA for long-duration space travel; Big Californian utilities expand their EV infrastructure spend in readiness for the phase out of petrol-powered transportation; Big study finds chemotherapy not useful in treatment of most common early stage breast cancer; Aussie webcams hacked and fake testimonials posted on YouTube as endorsements for scammers' service; Google Lens arrives on Android phones (and it's really useful); Big tech companies team up to make computers more accessible to the vision-impaired.