The New York Times claims that Donald Trump drinks ‘a dozen’ Diet Cokes a day. At 42mg of caffeine per 330ml, what impact, if any, could this have on the President’s health? Jordan Dunbar speaks to experts about the effect caffeine has on your brain and talks to a high profile self-confessed Diet Coke addict in the UK.

"Milkshake Duck" is internet slang for an ordinary person who is briefly cheered, but then swiftly turned upon. We explain why an 11 year old boy and his family are the latest victims of this phenomenon. Also, a BBC Brazil investigation has revealed that an army of so-called social media cyborgs tried to influence the country’s presidential election.

Why have so many women in so many different cultures and eras been denounced as witches? BBC Africa’s Sammy Awami visits a village in his home country of Tanzania where, just four months ago, five women were murdered after being accused of witchcraft. Sammy meets a witch doctor who believes he has met a witch and talks to a local politician who is trying to stop the killings.

(image: Donald Trump enjoying his Diet Coke at a Foundation Dinner at the Waldorf Astoria, New York. Photo Credit: Brendan Smialowski/Getty Images)

Headlines claim that eating chocolate can protect you from developing Alzheimer’s disease. The theory is that bioactives within chocolate called flavanols can help reduce the risk of heart attacks, strokes and even make your brain 30 years younger! But isn’t this too good to be true? The BBC’s Head of Statistics, Robert Cuffe, investigates,

How do you detect a Twitter bot? Two students in the United States have invented an online tool aimed at stopping the spread of political propaganda on Twitter. Also, how a goal celebration by the footballer Paul Pogba helped spread a massive online protest against slave auctions in Libya.

Why do we take so much courage from a crowd? At football matches, music festivals and protest marches, people become energised in groups. They can be frightening places when they erupt in violence, or peaceful forms of protest when we try to change social norms. Sandra Kanthal reports.

(Image: Large chunks of chocolate. Credit: Shutterstock)

Over the last decade journalists in the US have been suspicious of the number of people who seem to have won multiple prizes on scratch cards and the lottery. We hear from a reporter and statistician who poured over data across a number of states to work out the chances of multiple wins.

Coming of age rituals, hazing at universities or entrance rites into secretive organisations - initiations are present in every culture around the world. They are often secretive and can involve horrific ordeals, so why do people put up with the pain?

(Photo: A customer purchasing lottery tickets at a store in San Lorenzo, California. Credit: Justin Sullivan/Getty Images)

Mr Darcy, the male love interest in Jane Austen’s 19th Century English novel Pride and Prejudice is supposed to be fabulously wealthy on an income of £10,000 a year, but two hundred years later, it’s not clear how rich he really is. As Tim Harford discovers, you need to do more than adjust the amount for inflation.

A BBC Trending investigation finds that part of YouTube's system for reporting sexualised comments left on children's videos has not been functioning correctly for more than a year, according to volunteer moderators inside YouTube’s “Trusted Flagger” programme.

What can we learn about politics from the power struggles within chimpanzee groups? Professor James Tilley explores the parallels between our political world and that of other primates.

(Photo: Colin Firth as Mr Darcy and Jennifer Ehle as Elizabeth Bennet in the BBC adaptation of Jane Austen's Pride and Prejudice 1995)

Italy’s failure to qualify for the World Cup for the first time in 60 years will damage more than national pride. It will also carry a big financial cost – one estimate says Fifa stands to lose $100m. Is this really true? Also, we fact check the claim that 45% of Nigerian women marry before their 18th birthday.

For the second in our special series from Russia, we trace how opposition leader Alexei Navalny has used social media to move from writing LiveJournal blogs about corruption to trying to run for president.

Also, how true are beliefs about the differences between the way men and women speak, such as women apologise more and men interrupt more? Catherine Carr speaks to leading linguists, who have studied thousands of conversations and gathered data to find out what’s going on.

(Photo: Alessandro Florenzi of Italy at the end of the Fifa 2018 World Cup Qualifier play-off, 2017. Credit: Marco Luzzani/Getty Images)

We discover how a numerical change in the way the pop music album charts are measured is causing artists to make ever longer albums.

The first of two special reports into the Russian internet. For years it provided an open platform for news and discussion with vastly different content to the news presented on the largely state-run television channels. We hear how over the last few years government regulation has been building up, and the authorities have started to curtail the kind of material that can be posted and seen online.

Why are so many films dubbed into another language? Rhianna Dhillon discovers the artistic, social and political reasons why many countries including Italy, France and Spanish speaking countries have opted to dub rather than subtitle movies.

(Image: Chris Brown performs onstage at 2017 BET Awards. Credit: Paras Griffin/Getty Images for BET)

Two statistics from Nigeria: do lawmakers really get paid $1.7 m – much more than the American President and does eating yams give Yoruba communities a record number of twins? We talk to the fact checkers at Africa Check.

We investigate connections between Moscow and “Calexit” groups that want to break up the United States. Also, the list of "sexual predator" professors that has sparked an online debate in India.

Millions of people every year visit sites of death, tragedy and destruction, from nuclear disaster zones to genocide memorials. Is it an effort to understand the darker parts of our history, or are we just indulging our morbid curiosity? Mary-Ann Ochota investigates dark tourism.

(Photo: Seven-year-old twin sisters Seye and Sayo on their way to a party in the south-western Nigerian town of Igbo-Ora. Photo credit: Pius Utomi Ekpei/Getty Images)

Stephen King once said that wannabe authors should avoid using adverbs which end with ‘ly’ but does he follow his own advice? Data journalist Ben Blatt decided to find out. He also analysed texts written by some of the best known authors to discover the words they use obsessively.

This year has seen a sharp rise in the number of confrontations in America between far right white supremacists and a group known as antifa – the anti fascists. We look at these two groups in traditionally liberal towns like Berkeley, California and Portland, Oregon and ask who is winning and what they are fighting for.

Do you ever feel like a fraud? Do you think that you don’t deserve your success and one day you’ll be found out? If so, you may suffer from Imposter Syndrome. It can afflict both men and women and people who belong to minority groups of whom there are stereotypes about competence also commonly experience imposter feelings. Afua Hirsch reports.

(Photo: American novelist Ernest Hemingway in 1954 on safari in Africa. Credit: Hulton Archive/Getty Images)

Did the 2016 US election galvanise young people to become more engaged in politics? Millennial statistician Kevin Lin designed a research project to see if there was evidence to prove this on the website Reddit. Kevin explains his findings and the pitfalls of trying to measure anything on social media.

This year has seen a sharp rise in the number of confrontations in America between far right white supremacists and a group known as antifa – the anti fascists. White nationalists claim they want to protect the right to free speech but their opponents believe it’s an excuse to promote often racist ideologies. The fight that lived online is now being played out on the streets.

Serial killers and their terrible high profile crimes have spawned a massive global industry... feature films, documentaries, TV series, books, magazine profiles, hit podcasts and video games. So why do many of us find serial killers so intriguing? Is it their psychology or the gory details of their murders? Becky Milligan investigates.

(Photo: Students from Los Angeles California high schools gather to protest the election of Republican Donald Trump as President of the United States. Credit: David McNew/Getty Images)

Richard Thaler is this year’s recipient of the Nobel Memorial Prize for Economic Sciences. Charlotte McDonald speaks to Tim Harford to get an insight into Thaler’s work and explore the psychological realism of behavioural economics.

The Russian military wants to stop its regular soldiers from posting selfies on social media and an online argument has started between two rival film-makers documenting the life and death of a black transsexual woman. The trending team find out why.

Lucy Ash looks into breath-holding. From those who choose to restrict it to others who do it subconsciously, how does breath-holding affect our bodies and our minds?

(Photo: Prof Richard Thaler standing in front of portraits of previous winners at the University of Chicago: Credit: Scott Olson/Getty Images)