Who will fact check for you before and after referenda and elections? Who will tell you that 6,000 people need repeat smear tests? Mark Zuckerberg?, writes Joyce Fegan.

In 2019 and beyond, we should support companies that hold themselves to the highest ethical standards, writes Dave Troy. Anything else is just a recipe for disaster.

There can hardly be more disconcerting examples of what happens when the truth is managed to make room for propaganda than Brexit or Donald Trump’s US presidency.

At the click of a button, we cede our privacy to internet platforms, but data ownership is the next obvious evolution from property rights, whether they be actual or intellectual, says Gaspard Koenig.

How would any right-thinking person make this comparison, a week after five people were shot dead at the offices of the Capital Gazette newspaper in Annapolis, Maryland, writes Alison O'Connor

Facebook has yet to explain why users were not informed about the Cambridge Analytica data leak when Facebook learned about it, writes Leonid Bershidsky

The Cambridge academic at the centre of a row over the use of Facebook users’ private data has dismissed claims the information could have been used to influence voters.

With a month left until the referendum to repeal the eighth amendment, campaigning has intensified on both sides, writes Louise O’Neill.

People here are unlikely to be affected by fresh privacy protection concerns over Facebook after revelations that the social media giant has put 1.5bn accounts beyond the reach of new EU data protection rules.

Some 80,000 obese children in Ireland need surgical intervention to tackle their weight issues or they may not make it to adulthood, a doctor has warned.

Shares in British pub group JD Wetherspoon rose up to 1.5%, backing up outspoken chairman Tim Martin’s claim that the decision to quit all of its social media accounts would not negatively affect the group’s business.

The Government is to face stiff questioning in the Dáil over the data breach scandal at Independent News and Media (INM) this week, with Sinn Féin and Fianna Fáil expected to raise the issue.

One hundred cardboard cutouts of Facebook chief Mark Zuckerberg were erected this week on the lawn outside the Capitol building in Washington.

Facebook will investigate "tens of thousands" of apps to discover if any other companies have accessed data in a similar way to Cambridge Analytica (CA), Mark Zuckerberg has told US politicians.

Hungary’s Viktor Orbán’s was re-elected last weekend to serve a fourth term as prime minister.

Here are all the latest headlines this lunchtime.

Facebook founder Mark Zuckerberg has turned down an invitation to give evidence to a UK House of Commons committee investigating allegations of misuse of the data of the social media giant's users.

A Downing Street aide is facing calls to resign after allegedly "outing" a whisteblower who claimed the official Brexit campaign broke strict spending rules during the European Union referendum.

A watchdog told Facebook that relying on developers to follow information rules in some cases was not good enough two years before a "data grab" on millions of users is said to have taken place.

What did you expect? You tell the world about your lifestyle, your habits, your likes and dislikes, your hopes, dreams and fears. And then you discover that the world is not offering a sympathetic ear, but instead milking you for all you’re worth?

Politicians and regulators are demanding answers from the social media giant in the wake of revelations about the use of users’ personal information, writes Ben Brody

Robert Mercer and his daughter were key players in Trump’s victory. But they will find a repeat performance difficult, writes Bette Browne

Facebook is under fire following reports that the personal data of 50 million users were obtained by an analytics firm that helped elect US president Donald Trump.

Facebook had "wild west" approach to looking after its users' data and had "little detection" of any violations of its policies, a former employee of the company has told British MPs.

Shares in Facebook continued their sharp slide, extending their dip this week to around 10% that has cost CEO and founder Mark Zuckerberg around $10bn (€8bn) in paper losses.

A data protection expert has called for the State to intervene in the investigation into the use of Facebook data by Cambridge Analytica, and has warned that an Oireachtas bill could legalise such data-harvesting.

Latest: Facebook founder Mark Zuckerberg has been summoned to give evidence before the parliamentary inquiry into fake news after revelations about users' personal data held by British firm Cambridge Analytica (CA).

Your lunchtime headlines ...

Your morning's headlines ...

Facebook plunged to its worst loss in four years on Monday and led a rout in technology companies.

Failing to secure a Brexit deal with the European Union would put Britain at a "very big disadvantage", Hillary Clinton has claimed.

The fact is that, although the outward and visible sign was poor communications, the underlying policy reality was the problem, writes Terry Prone.

Donald Trump’s campaign expenses more than doubled last month, even as the Republican presidential nominee held his payroll to about 70 employees, aired zero television advertisements, and undertook no significant operational buildout across the country.