Is it true that… you should take vitamin C when you’ve got a cold?

The vitamin has many benefits, but research shows that people who take it are just as likely to get the sniffles as those who don’t

‘Vitamin C is important for your health in lots of ways,” says Daniel M Davis, the head of life sciences at Imperial College London. It is a strong antioxidant, helping protect cells from harmful unstable compounds that arise from toxins and pollution. It helps the body absorb iron, and is also used in the production of collagen. “But the idea that taking high doses of vitamin C – or drinking lots of orange juice – will stop you catching a cold, or help you recover faster, is a myth.”

Davis, the author of Self Defence: A Myth-Busting Guide to Immune Health, explains that the popular belief in vitamin C’s cold-fighting powers has persisted for more than 50 years, “pretty much solely because of the evangelical view of one man: Linus Pauling”.

Published: December 8, 2025, 8:00 am

Your Party let me down with membership chaos

A reader found there seemed no way to cancel a subscription for Jeremy Corbyn and Zarah Sultana’s new party

I subscribed to Your Party at its shambolic start and am now finding it impossible to cancel my membership. No one replies to emails. My local party branch told me it can’t help.

The portal requires me to open a new account and commit to another payment in order to cancel anything.

Published: December 8, 2025, 7:00 am

More than 200 environmental groups demand halt to new US datacenters

Exclusive: Congress urged to act against energy-hungry facilities blamed for increasing bills and worsening climate crisis

A coalition of more than 230 environmental groups has demanded a national moratorium on new datacenters in the US, the latest salvo in a growing backlash to a booming artificial intelligence industry that has been blamed for escalating electricity bills and worsening the climate crisis.

The green groups, including Greenpeace, Friends of the Earth, Food & Water Watch and dozens of local organizations, have urged members of Congress to halt the proliferation of energy-hungry datacenters, accusing them of causing planet-heating emissions, sucking up vast amounts of water and exacerbating electricity bill increases that have hit Americans this year.

Published: December 8, 2025, 12:00 pm

‘It has to be genuine’: older influencers drive growth on social media

As midlife audiences turn to digital media, the 55 to 64 age bracket is an increasingly important demographic

In 2022, Caroline Idiens was on holiday halfway up an Italian mountain when her brother called to tell her to check her Instagram account. “I said, ‘I haven’t got any wifi. And he said: ‘Every time you refresh, it’s adding 500 followers.’ So I had to try to get to the top of the hill with the phone to check for myself.”

A personal trainer from Berkshire who began posting her fitness classes online at the start of lockdown in 2020, Idiens, 53, had already built a respectable following.

Published: December 8, 2025, 12:48 pm

Social media use damages children’s ability to focus, say researchers

Study of 8,300 US children suggests social media may be contributing to a rise in ADHD diagnoses

Increased use of social media by children damages their concentration levels and may be contributing to an increase in cases of attention deficit hyperactivity disorder, according to a study.

The peer-reviewed report monitored the development of more than 8,300 US-based children from the age of 10 to 14 and linked social media use to “increased inattention symptoms”.

Published: December 8, 2025, 3:02 pm

Scores of UK parliamentarians join call to regulate most powerful AI systems

Exclusive: Campaign urges PM to show independence from US and push to rein in development of superintelligence

More than 100 UK parliamentarians are calling on the government to introduce binding regulations on the most powerful AI systems as concern grows that ministers are moving too slowly to create safeguards in the face of lobbying from the technology industry.

A former AI minister and defence secretary are part of a cross-party group of Westminster MPs, peers and elected members of the Scottish, Welsh and Northern Irish legislatures demanding stricter controls on frontier systems, citing fears superintelligent AI “would compromise national and global security”.

Published: December 8, 2025, 5:00 am

Is AI a bubble that’s about to pop? – podcast

Should we be worried about the vast amounts of money pouring into AI? And what will happen if the bubble bursts? Blake Montgomery reports

For months there have been fears that artificial intelligence is a bubble and that it is about to burst.

As the Guardian US tech editor Blake Montgomery explains, the magnificent seven – Alphabet, Amazon, Apple, Meta, Microsoft, Nvidia and Tesla – make up one-third of the value of the S&P 500, the index of the 500 biggest stocks in the US market. All are heavily invested in AI.

Published: December 8, 2025, 3:00 am

A US psychologist prescribed a social media ban for kids. How did Australia become the test subject?

From nascent policy idea in one state to passing federal parliament in just days, it has been a whirlwind journey for the world-first legislation that will take effect from 10 December

• Australia social media ban explained: everything you need to know

In early 2024, the South Australian premier’s wife put down a book she had been reading. It was Jonathan Haidt’s The Anxious Generation.

“[She] said to me you better bloody do something about this ... and then we got to work,” Peter Malinauskas later recalled in an ABC interview.

Published: December 7, 2025, 2:00 pm

Don’t use ‘admin’: UK’s top 20 most-used passwords revealed as scams soar

Easy-to-guess words and figures still dominate, alarming cysbersecurity experts and delighting hackers

It is a hacker’s dream. Even in the face of repeated warnings to protect online accounts, a new study reveals that “admin” is the most commonly used password in the UK.

The second most popular, “123456”, is also unlikely to keep hackers at bay.

Published: December 7, 2025, 7:00 am

‘Kids can’t buy them anywhere’: how Pokémon cards became a stock market for millennials

A surprising economic bubble is making it hard for anyone to buy Pokémon cards – especially children

Pokémon has been huge since the late 90s. Millions of people have fond memories of playing the original Red and Blue games, or trading cards in the playground for that elusive shiny Charizard (if your school didn’t ban them). The franchise has only grown since then – but, where the trading cards are concerned, things have taken an unexpected and unfortunate turn. It’s now almost impossible to get your hands on newly released cards thanks to an insane rise in reselling and scalping over the past year.

Selling on your old cards to collectors has always been part of the hobby, and like baseball cards or Magic: The Gathering, Pokémon cards can sometimes go for thousands of pounds. However, the resale market for Pokémon has climbed so high that even new cards are valued at hundreds, before they’ve even been released. The latest set, Phantasmal Flames, had a rare special illustration Charizard that was being valued at more than £600 before anyone had even found one. When a pack of cards retails at about £4, there’s a huge potential profit to be had.

Published: December 8, 2025, 10:00 am

A robot walks into a bar: can a Melbourne researcher get AI to do comedy?

Machines can be funny when they mistakenly bump into things – but standup is a tough gig even for humans

Robots can make humans laugh – mostly when they fall over – but a new research project is looking at whether robots using AI could ever be genuinely funny.

If you ask ChatGPT for a funny joke, it will serve you up something that belongs in a Christmas cracker: “Why don’t skeletons fight each other? Because they don’t have the guts.”

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Published: December 7, 2025, 2:00 pm

Ancient Egyptian pleasure boat found by archaeologists off Alexandria coast

First-century luxury vessel matches description by the Greek historian Strabo, who visited city around 29-25BC

An ancient Egyptian pleasure boat that matches a description by the first-century Greek historian Strabo has been discovered off the coast of Alexandria, to the excitement of archaeologists.

With its palaces, temples and the 130 metre-high Pharos lighthouse – one of the seven wonders of the ancient world – Alexandria had been one of the most magnificent cities in antiquity. The pleasure boat, which dates from the first half of the first century AD, was 35 metres long and constructed to hold a central pavilion with a luxuriously decorated cabin.

Published: December 8, 2025, 9:00 am

Linguists start compiling first ever complete dictionary of ancient Celtic

More than 1,000 words used as far back as 325BC to be collected for insight into past linguistic landscape

It is not likely to be a hefty volume because the vast majority of the material has been lost in the mists of time. But the remnants of a language spoken in parts of the UK and Ireland 2,000 years ago are being collected for what is being billed as the first complete dictionary of ancient Celtic.

The dictionary will not be huge because relatively few words survive, but experts from Aberystwyth University say they expect they will end up with more than 1,000 words.

Published: December 8, 2025, 5:00 am

Starwatch: Brave the cold and the enjoy the Geminids meteor shower

Observers in dark locations away from street lighting can expect to see more than 100 meteors an hour

The Perseid meteor shower in August often catches the headlines because of the warmer conditions associated with watching the display, but to many astronomers the Geminids put on the better show.

The Geminids have been active since 4 December and they reach their climax this week with the peak of the shower taking place on the night of 13-14 December. The chart shows the view looking south-east from London at midnight as 13 December becomes 14 December.

Published: December 8, 2025, 6:00 am

Can you solve it? The forgotten Dutch invention that created the modern world

You saw it here first

UPDATE: Read the solution here

There are many contenders for “world’s greatest invention.” The wheel. The printing press. The steam engine.

According to a new book, however, that title should go to the mechanised sawmill invented by Dutchman Cornelis Corneliszoon in 1593.

Published: December 8, 2025, 7:10 am

The Guardian view on ageing research: our lives have more distinct phases than we thought | Editorial

Tech moguls may foolishly hope to stay forever young, but others could benefit too from evidence of the human body’s dynamic and varied journey through life

Ageing can feel remarkably sudden. One morning you awake to find new aches, or lapses in strength and memory that you could swear were not present just a few days prior. We do not literally age overnight, but as research is increasingly showing, we may not do so in a steady, linear path either.

Over the past decade a multitude of studies have suggested that ageing – at least for certain organs and bodily systems – may actually consist of long periods of stability, punctuated by inflection points or periods of rapid biological change. This shift in thinking has raised hopes for anti-ageing medicines. But it could also make us rethink our attitude to ageing in general, viewing it as a dynamic and varied journey – rather than simply a slow march of attrition and breakdown.

Published: December 7, 2025, 5:25 pm