A Queensland University study finds that limiting time on Facebook lowers levels of the stress hormone cortisol, as Facebook boss Mark Zuckerberg gets a grilling from Congress. Regulation of the social behemoth seems far more likely now, as millions around the world are notified they're data was misused.

Our weekly news round-up: Boost for space tourists as Virgin Galactic's VSS Unity soars in flawless test flight; Flesh-eating super bug outbreak reaches epidemic levels on coasts south of Melbourne; Red Bull plans to send rovers to Apollo 17 landing site in 2019 media extravaganza; NASA's TESS exoplanet hunter ready for launch; SpaceX's huge internet-from-space satellite constellation approved by FCC; Big revamp for Gmail; Tesla's solar roof in use in California; NBN rolls out fibre-to-the-curb, for the lucky few.

The view from space shows our planet's nights are getting much brighter, thanks to economic development and the increasing use of LED lighting. But there are adverse effects for plant and animal life, not to mention city dwellers looking to marvel at the firmament above.

Dr. Ian Storey, lecturer in information systems at RMIT, discusses the vast potential for good and ill offered by quantum computing. QC can help molecular modelling, industrial processes and AI, but might in the long run threaten encryption, on which secure ecommerce depends.

Our weekly news round-up: How to cheaply upgrade iPhone storage; Chinese space station crashes back to Earth; Musk April Fool's tweet backfires; Russian hacker of Linkedin, DropBox and Formspring finally extradited to US to face the music; Google Lunar X Prize competition to rove on the moon expires with no result.

A serious security flaw exists in the hardware at the heart of many of the world's computers. And being hardware, it can't be fixed with a software patch. Dr. Ian Storey says it can give access to supposedly secure areas of microprocessors, where passwords and private keys are stored, thereby threatening safe ecommerce.

The social network stands accused of allowing Cambridge Analytica, a political consulting firm, to use psychographic data to target political and divisive ads on its platform. Congress and the UK's Information Commissioner are looking into whether the data of 50 million Facebook users was illegally used both in the last US presidential election and in the Brexit campaign.

RMIT's Dr. Ian Storey teaches risk and prospect theory. Here he discusses risk assessment for companies, explaining the psychology of risk analysis and how it's not just a matter of maths, there's plenty of psychology too.

Our weekly news round-up: Elon Musk backs #deletefacebook campaign by taking down Tesla and SpaceX pages; Tim Cook tells China Development Forum new regulations are needed to protect privacy online; Australia to deploy wind and solar powered ocean research drones; Great Pacific Garbage Patch far bigger than previously thought; Millions of Spotify users have ad blockers to avoid paying for the service; Smart farms showcased in Sydney; Google Chrome cracks down on autoplay video ads; Samsung Pay connects Australia's big banks into its NFC payment system.

Where do devices like Google Home, Home Pod or Alexa store all the data they collect about your life at home? What protections should exist for users of this technology?