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Drugs designed to address erectile dysfunction could also significantly reduce the risk of colorectal cancers, new research suggests.
The wife of Alexander Litvinenko has told Sky News she is devastated she cannot return to Russia to see her family over fears for her safety.
A "significant step" has been made in Brexit negotiations after a breakthrough deal was reached on the transition period.
YouTuber Logan Paul, who caused outrage when he posted a video showing the body of a suicide victim, is to fight fellow vlogger KSI at Manchester Arena in August.
Vladimir Putin has called for political unity as he starts his fourth term as president of Russia.
A dog was whipped "into a frenzy" and thrown into an icy river in a locked cage for a scene in a film, a whistleblower has claimed.
A British woman has been killed fighting alongside Kurdish armed forces in northern Syria.
A Spanish island described as an "unspoiled paradise" and which boasts a 13-bedroom house, chapel and watchtower, has been bought by a family from Luxembourg for €18m (£16m) "for their own use".
A nine-year-old boy has shot his sister in the back of the head in an argument over a video game controller.
Dozens of homes have been destroyed by fire in Australia's southeast, although there have been no reports of injuries.
A Cirque du Soleil performer has died after falling onto a stage at a weekend show in Florida.
A British man has died in Majorca after falling from a fifth-floor balcony, according to reports.
Vladimir Putin has dismissed accusations Russia was behind the poisoning of former spy Sergei Skripal as "nonsense".
Exit polls suggest Vladimir Putin has won a fourth term with more than 70% of the vote, keeping him as Russia's president for six more years.
Donald Trump has unleashed another Twitter attack on the investigation into whether his presidential campaign colluded with Russia.
North Korean rockets fitted with nuclear weapons can now reach Germany and central Europe, a security official has reportedly warned.
It is not a presidential election in the conventional sense.
Turkey's president says his forces and Syrian opposition fighters have seized control of the town of Afrin from Kurdish militants.
The Government is preparing further moves against Russia following a day of tit-for-tat action over the poisoning of former spy Sergei Skripal.
Before there was a nerve agent attack on the streets of Salisbury, Vladimir Putin stood before his people and promised to improve their lot.
The Information Commissioner's Office is to investigate a possible data breach affecting more than 50 million Facebook users.
Whether you're Irish, British, royalty or even the last Jedi in the galaxy, St Patrick's Day is a chance to celebrate.
A Malaysian firefighter dubbed the "snake whisperer" because of his skill in handling deadly snakes has died after being bitten by a cobra.
There's been a lot of what you might call "huffing and puffing" on both sides. But Russia will likely now hope this whole thing blows over.
The bodies of 14 people have been recovered after a suspected migrant smuggling boat sank off a Greek island in the eastern Aegean.
Chinese President Xi Jinping has been reappointed with no limit on the number of terms he can serve.
Bushmills whiskey has a long history, originally granted its license in 1608, just as settlers arrived in North America and as King James I was on the throne.
One of Russia's most senior diplomats has told Sky News his country has never possessed a nerve agent with the codename "novichok" and has destroyed all its chemical weapons.
Thousands of Syrians have fled two major assaults which have seen dozens of people killed at opposite ends of the war-torn country.
Eight people have been injured in a ski lift accident which saw skiers hurled from their seats.
British counter-terror police have launched a murder investigation into the death of Russian Nikolai Glushkov in London.
Moscow has opened a "murder" investigation into the death of Russian Nikolai Glushkov in London.
South Africa's former president Jacob Zuma will be charged with corruption over a massive arms deal in the 1990s.
North Korea has begun testing a nuclear reactor that could be used to produce weapons-grade plutonium, according to intelligence analysts.
Facebook has apologised after a glitch in its search function suggested that users might be interested in child sexual abuse videos.
A self-declared "cyborg" has been fined after he was unable to produce his travel card on request - because it had been implanted in his hand.
Li Ka-shing, the Hong Kong businessman dubbed 'Superman', has confirmed he will retire in May ahead of his 90th birthday.
A speech John F Kennedy was due to deliver in Dallas on the day of his assassination has been recreated with recordings of his voice.
North Korea's foreign minister has travelled to Sweden, fuelling speculation that Donald Trump's meeting with Kim Jong Un could take place in the country.
Zimbabwe's former leader Robert Mugabe has said his country must "undo" the "coup d'etat" that saw him ousted from power late last year.
One of President Putin's longest standing opponents has told Sky News that the Salisbury attack was the consequence of Western indifference to an ever-evolving threat from Russia and that the UK was targeted because it is perceived as weak.
A pedestrian bridge has collapsed in Florida leaving several cars trapped.
Airlines could be explicitly banned from placing animals in overhead lockers on planes in legislation proposed after the death of a puppy.
Rihanna has slammed Snapchat for "intentionally" shaming victims of domestic violence.
An arrest warrant for the sister of Saudi Arabia's Crown Prince has been issued in France amid allegations she ordered her bodyguard to beat up a decorator.
Tons of gold have fallen out of the sky in Russia after a cargo plane malfunctioned in mid-air.
The US has imposed sanctions on 19 Russians for alleged interference in the 2016 Presidential election.
Thousands managed to escape the Syrian rebel enclave of eastern Ghouta on Thursday, as regime forces advanced further into an area which has been described as "hell on earth".
Mossack Fonseca, the firm at the root of the Panama Papers scandal, is to cease operations following the fallout from the data breach.
Platypus milk might be the antidote humanity needs to deal with antibiotic-resistant germs and diseases, according to new research.
A pregnant woman who shot dead her boyfriend in a botched YouTube stunt has been jailed for six months.
Unilever, the maker of top consumer brands including Marmite and Persil, is to abandon the UK as its headquarters as part of a major shake-up of the group.
Tests on some of the world's leading brands of bottled water have found most contain tiny pieces of plastic.
Research by NASA on identical twins has revealed that being in space changes human genes.
Growing up in Kabul might seem like a tough enough prospect these days - but spare a thought for the toddler named Donald Trump.
Recordings have been released of phone calls made by terrified students and teachers as a gunman massacred their classmates.
Those from the UK travelling to Russia have been warned they could face "anti-British sentiment or harassment" amid the growing tension between the two countries.
Irish music giant Liam O'Flynn, who helped form influential folk band Planxty, has died aged 72.
Angela Merkel has finally begun her fourth term as Chancellor after almost six months of political deadlock in Germany.
Astronomers have discovered that all galaxies, regardless of their size, rotate once every billion years.
No President has ever fired a Secretary of State via social media before - but it was still possibly not the most significant moment in Donald Trump's last 24 hours.
A New Zealand diplomat has been criticised after saying that the US Democratic Party should get its "s*** together".
Donald Trump claimed California is "begging" for a see-through border wall with Mexico during a trip to view prototypes in San Diego.
The British broadcasting regulator has placed Russian-funded television station RT on notice following a chemical weapon attack in the UK.
The man set to become the new US Secretary of State is a conservative hardliner who has grown close to Donald Trump during a meteoric career.
Donald Trump has replaced Rex Tillerson as US Secretary of State.
The UK will "regret" its decision to leave the European Union, Brussels' top official has warned.
The grandson of cult leader Charles Manson has won a four-month court battle over the rights to his body.
The Russian foreign ministry has mocked allegations of its involvement in a chemical weapon attack in the UK which seriously harmed three people.
An improved outlook for world economic growth will be placed at severe risk if a trade war results from US metal tariffs, a report has warned.
Donald Trump has exercised rarely-used powers to block the hostile takeover of mobile chipmaker Qualcomm by Singapore-based rival Broadcom.
A firefighter, journalist and Argentinian tourist were among five people killed when a helicopter went down in a New York City river.
A man known as the "Bookkeeper of Auschwitz" has died at the age of 96 - shortly before he was due to begin a four-year prison sentence.
Three package bombings which have killed two people in 10 days are believed to be linked, say police in Texas.
The body of an eight-year-old boy who had been missing for nearly two weeks has been found in his father's partner's car, police in Spain have said.
Crumb-proof keyboards may be on the horizon after Apple filed a patent for new designs.
A Turkish heiress and bride-to-be has been killed in a plane crash alongside her friends as they returned from her bachelorette weekend.
Queensland authorities have warned that crocodiles and snakes could turn up in "unexpected areas" after four days of torrential rain broke river banks, covered fields and cut off towns.
French fashion designer Hubert de Givenchy has died aged 91.
Police are hunting for a football club owner who allegedly marched on to the pitch while carrying a gun.
The European Union has vowed to stand up to protectionist "bullies" as Donald Trump prepares to impose trade tariffs on many metal products.
A plane has crashed at an airport and veered off the runway into a nearby football pitch, according to Nepalese media.
Country music star Tim McGraw has collapsed on stage during a show at the Country to Country festival in Ireland.
A British-Iranian national has been jailed for six years on spying charges, according to reports in Iran.
A man armed with a knife has been shot dead outside the Iranian Ambassador's home in Vienna.
All five passengers on a helicopter have been killed after it crashed into the East River off Manhattan.
The Secretary General of the Commonwealth has described next month's Heads of Government meeting (CHOGM) as a "wonderful opportunity" for leaders to "talk about anything they wish to", following reports they may discuss the delicate subject of who will succeed the Queen as their head.
At least 16 people have died after a church in southern Rwanda was hit by lightning.
Happy birthday to the World Wide Web!
The US will not be making any concessions to North Korea during forthcoming nuclear talks, according to the CIA's director.
A Turkish private jet has crashed in a remote part of Iran's Zagros mountains, killing all 11 people on board.
National Front leader Marine Le Pen has suggested her party change its name to National Rally in an attempt to detoxify its image.
China has abolished the limit on how long its leader can serve, meaning President Xi could now rule the country indefinitely.
U2 singer Bono has apologised following claims that workers at a charity he co-founded suffered bullying and abuse.
The army veteran who shot dead three women at a treatment centre struggled to adjust to life after returning from Afghanistan, according to his childhood guardian.
Appearing alongside French far-right leader Marine Le Pen, Donald Trump's former adviser Steve Bannon told Front National supporters to wear any assertions they were "racist" as a "badge of honour".
A nightclub has been shut down after a video showing a scantily clad woman riding a horse inside the packed venue before falling off went viral.
A nun who was involved in a property lawsuit with pop star Katy Perry has died after collapsing in court.
The Syrian regime's bombardment of rebel-held eastern Ghouta has now claimed the lives of more than 1,000 civilians, according to the Syrian Observatory for Human Rights.
Organisers of a prestigious elephant polo tournament in Thailand have said they are "saddened" by behind-the-scenes footage that appears to show animals being beaten with sharp metal poles.