Newspaper headlines: Ozzy Osbourne's diagnosis and Trump climate row
The irony of making climate change a key issue at this year's World Economic Forum in Davos is not lost on some newspapers.
The Daily Telegraph's main cartoon shows dozens of the world's elite scrambling from their private jets at the local airport, with one of them shouting to the others: "Hurry, we don't want to miss Greta Thunberg."
But it's President Trump's speech describing environmental campaigners as "prophets of doom" that gets the most attention.
The Financial Times says he used his address to strike a defiant tone at an event dominated by concerns about the environment.
The headline on the front of the i newspaper describes Mr Trump as "Earth's Number One climate change denier", while the Metro says he had already raised eyebrows by arriving with a huge convoy of jeeps, a jet and seven helicopters.
For its main story, the Guardian says it has been told by sources that the founder of Amazon, Jeff Bezos, had his mobile phone "hacked" after receiving a WhatsApp message apparently sent from the personal account of the Saudi crown prince.
It reports that the encrypted message from the number used by Mohammed bin Salman is believed to have included a malicious file that infiltrated Mr Bezos's phone.
Large amounts of data were taken from the phone within hours, the paper adds. The Saudis have dismissed the report as "absurd".
New online safety rules
The Telegraph leads with the introduction by the Information Commissioner of strict rules aimed at protecting children from harmful content on the internet.
Slowly but surely, the paper says, the walls of regulation are closing around the internet and social media companies.
But, it adds, it is more slowly than surely - and there is a long way to go to create a safe space for our children.
The Daily Express is pleased with the government's promise to end the automatic early release for prisoners convicted of the most dangerous crimes.
But at the same time, its leader column warns that society will not be safer if inmates spend years in squalid, overcrowded and drug-ridden prisons.
It says jails must be true engines of rehabilitation rather than "universities of crime".
According to the Daily Mail's lead, Princess Diana's niece has joined the Queen's grandson, Peter Phillips, in using royal connections to promote milk sales in China.
The paper says that a day after it exposed Mr Phillips' commercial work, it emerged that Lady Kitty Spencer has got in on the act too - and the pair are going head to head by plugging rival Chinese dairy brands. Neither Lady Kitty's agent nor Buckingham Palace have commented.
Meanwhile, the Telegraph reports that senior Tories have complained that Boris Johnson was "blindsided" by Tony Hall's resignation as BBC director general, and Number 10 was given just an hour's notice.
A source is quoted as saying given this was an announcement of such public interest, the government would have expected to get "a little more" warning of it.
Leader writers are disturbed by a warning from the Alzheimer's Society that vulnerable dementia patients in England are being left in hospitals because of a lack of care in the community.
For the Daily Mail, better treatment of dementia sufferers will only happen if the broken care system is fixed - and the paper demands that Boris Johnson delivers on his pledge to solve the crisis.
The Express says the fiasco is a source of heartbreak, worry and danger that cannot be ignored any longer.
And the Mirror calls for the wealthiest to be taxed a little more to fund high quality care for everyone - as well as the introduction of a National Care Service.
Meanwhile, the Sun says that after years of giving the HS2 high-speed rail project the benefit of the doubt, it is now calling for its scrapping - and the prime minister "must pull the plug before it's too late".
The newspaper describes the mounting costs as "an obscene and reckless sum for a railway much of the country doesn't want".
Instead, the paper suggests that some of the billions should be spent on a massive rail upgrade and a huge new network of bus routes in the Midlands and north of England.
Finally, the whole of Year 11 at Fitzalan High School in Cardiff and their maths teacher feature in several papers - after all 30 pupils achieved A* grades in the subject at GCSE, six months early.
The Daily Mirror says the pupils have hailed Francis Elive a hero after he helped them achieve the top grades.
The Times says his passionate approach to his subject reaped dividends and he has been described as the "maths whisperer".
Mr Elive is quoted in the Express as saying there's no secret method, just hard work.