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imageSewers could have bomb-sniffing sensors installed

Hidden beneath the streets of Stockholm, the city's sewage plant is working at full throttle.

As we head into one of the tunnels, the stench is overpowering: through here, the waste of 700,000 people flows.

But sewer systems have been earmarked for a new use: the fight against terrorism is moving underground.

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We have a bunch of electrodes, and immerse them in the sewage”

End Quote Hans Oennerud Emphasis coordinator...

Read more: Sewer sensors to sniff out bombs

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Architects have traditionally used physical models of proposed buildings to demonstrate to planners and members of the public how a project will look when it is completed....

Read more: VIDEO: Could VR help build better cities?

imageIn downtown Denver, a sold-out crowd of 150 would-be cannabis entrepreneurs listened to pitches

It is an all-too-familiar scene: a beautiful autumn day dawns outdoors and a group of pale coders are hard at work inside a downtown bar in Denver, Colorado, which has been transformed into the home base of a hackathon.

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The only difference? The people smoking a "bong" in the corner.

This is not an anachronism, but rather an obvious feature of what event organisers MassRoots have...

Read more: Coding for cannabis cash

Read more: Almaz's story

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"Boots on the ground" is shorthand for combat troops deployed in a foreign country. Barack Obama and David Cameron have both used it - it's a phrase that is constantly cropping up in the news. But where did it come from?

Infantry have been stomping in boots through mud and sand for centuries. Back in World War One "boot" was used as an alternative to "soldier", and a soldier's introduction to service was in "boot camp". But the expression "boots on the...

Read more: Why 'boots on the ground'?

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A woman has had her finger amputated after being bitten by a false widow spider....

Read more: VIDEO: False widow bite leads to amputation

imageTens of thousands of people remained on the streets of Hong Kong on Monday night

Protests in Hong Kong are continuing after tens of thousands of people defied calls for them to dismantle their camps and return home.

Demonstrations grew after police tried to disperse crowds using batons and tear gas in the early hours of Monday morning. Riot police later withdrew.

The pro-democracy protesters are angry at China for limiting their choice in Hong Kong's 2017 leadership elections.

China has warned other countries not to support the "illegal rallies".

The protesters -...

Read more: Hong Kong protesters stay on streets

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Tens of thousands of pro-democracy protesters are still occupying central Hong Kong, paralysing parts of the city....

Read more: VIDEO: Hong Kong protesters defy warnings

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This report contains some testimony you may find distressing...

Read more: VIDEO: The battle to protect gates of Baghdad

imageOnly eight of the accused appeared in court in Antwerp

Forty-six people have gone on trial in Antwerp on charges of belonging to a group that sent jihadists to Syria, the largest case of its kind in Belgium.

Prosecutors say the Sharia4Belgium organisation sent recruits to militant groups such as Islamic State (IS).

Only eight of the accused appeared in court. The rest are thought to be on the frontline - or dead - in Syria.

European governments are increasingly worried about the risks posed by their citizens fighting in Syria and Iraq....

Read more: Belgium tries 46 over jihadist links

imageUkrainian troops have been battling pro-Russian rebels across the east of the country

Seven Ukrainian soldiers are said to have died in a clash with pro-Russian rebels near Donetsk airport - in what would be the deadliest single incident for the military since a truce deal.

A tank shell hit the vehicle carrying the troops, an official said.

Three civilians were reportedly killed in other incidents.

Ukrainian activists earlier toppled a statue of Lenin in the eastern city of Kharkiv - a move likely to be seen as a provocation by pro-Russians.

Nationalist...

Read more: Clash 'kills seven Ukraine troops'

A 15-year-old boy is cleared of murder but found guilty of manslaughter

A teenage boy has been found guilty of shooting his 15-year-old girlfriend dead after she went to give him a birthday present.

Shereka Fab-Ann Marsh died after a single bullet from a counterfeit 1930s Italian Beretta pistol struck her in Hackney, east London, in March.

The boy, 15, was cleared of her murder but found guilty of manslaughter.

He was also found guilty at the Old Bailey of possession of a firearm...

Read more: Boy, 15, guilty of shooting girl dead

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Midwives will be joining other NHS workers in England in a strike over pay next month.

The Royal College of Midwives announced 82% of its members voted in favour - the first time they have ever been balloted on industrial action.

They will join other staff, including nurses, healthcare assistants and porters, in the 13 October walk-out.

The strike will last four hours, but the RCM said midwives will still be there for women giving birth.

Instead, it will be ante-natal and post-natal appointments that will...

Read more: Midwives vote for strike action

imageThree different versions of the painting were produced

A French scientist has revealed a major new discovery about one of Leonardo da Vinci's most famous paintings, shedding new light on his techniques.

Engineer Pascal Cotte has spent three years using reflective light technology to analyse The Lady with an Ermine.

Until now, it was thought the 500-year-old painting had always included the ceremonial animal.

Mr Cotte has shown the artist painted one portrait without the ermine and two with different versions of the fur.

Leonardo experts have described...

Read more: Scans reveal hidden Leonardo works

imageIt for Others, a video installation by Duncan Campbell

Visitors to this year's Turner Prize 2014 exhibition will find themselves spending much of their time watching films in semi-darkness.

The show, unveiled at Tate Britain on Monday, features several film works - and slide shows projected onto walls.

This year's artist nominees are Duncan Campbell, Ciara Phillips, James Richards and Tris Vonna-Michell.

Between them, they employ audio, video, craft and design - but there is no use of traditional painting or sculpture.

imageCiara Phillips'...

Read more: Film art dominates Turner Prize show

imagePolice special forces are at the scene

Police have surrounded a hotel in Brazil's capital, Brasilia, where a man is apparently holding another hostage.

About 300 people were in the hotel when a man stepped on to a balcony on the 13th floor holding what looked like a gun to the temple of a hotel employee.

The hostage is handcuffed and is wearing a vest stuffed with white cylinders.

Police said they could neither confirm whether the gun was real nor whether the cylinders could be explosives.

The hotel has been evacuated and...

Read more: Man 'taken hostage' in Brazil hotel

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Billionaire Donald Trump has said he "may sue" a Twitter user who tricked him into retweeting an image of British serial killers Fred and Rose West.

Mr Trump shared the spoof message that claimed the pair looked at him as a "big inspiration" and asked him to "RT for their memory".

Later he tweeted: "I guess this teaches you not to be nice or trusting."

Fred West was charged with a dozen murders in Gloucester but killed himself before the trial in 1995.

Rose West was convicted of 10 murders - many at...

Read more: Trump 'may sue' over Fred West tweet

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Police in Sudan say a Spanish embassy official has been found stabbed to death in the capital, Khartoum.

The 61-year-old, who has not been named, was the head of the visa section at the embassy, and had been living in Sudan for three years.

He was found dead at his home in Khartoum's eastern district of Garden City in the early hours of Monday, officials said.

The police and Sudan's foreign ministry said an investigation was under way.

A diplomatic source in Spain confirmed the death, according to Reuters news agency.

The motive...

Read more: Spanish official stabbed in Sudan

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