Airbus has built a giant sand pit in Stevenage to mimic the surface of Mars.
The indoor terrain, about the size of a basketball court, will be used to test systems on the rover that Europe will send to the Red Planet in 2018.
ExoMars, as it is known, will be a six-wheeled robot tasked with finding signs of past or present life.
Richard Lancaster, navigation and control analyst for the ExoMars project, gives the BBC a guided tour of Stevenage's own indoor version of the Red Planet, and explains how it is being used to test the rover.
India wants Australia to return 'stolen' Hindu statues
The figure of Shiva, as Lord of the Dance, is thought to have been looted from a temple in India
India has requested the return of two ancient Hindu statues from galleries in Australia following allegations they were stolen.
The National Gallery of Australia has removed one of the statues of the god Shiva from display.
It was purchased for $5m (£3m) in 2008 from a New York dealer who is accused of looting antiquities.
The other, considered a lesser work, has also been removed from display at the Art Gallery of New South Wales.
The dealer, Subhash Kapoor, is awaiting trial in India, where he is accused of looting statues and other antiquities in a multi-million dollar enterprise.
The National Gallery of Australia is suing Mr Kapoor and his company in New York, saying that they forged certifications about the statue.
It said that if proven, they would have been the victim of an audacious act of fraud.
It said in a statement that it had researched the 900-year-old bronze statue of a dancing Shiva for more than a year before agreeing to the purchase.
It is considered a superb example of bronze casting from the Chola period in the south Indian state of Tamil Nadu.
It is one of 22 items bought by the gallery from Mr Kapoor's company.
The Indian government said the two statues had been exported in contravention of cultural property laws.
The museums are preparing to return the statues to India, according to reports in the Australian media.
Power firms are back in the spotlight, with the Daily Telegraph reporting that regulator Ofgem is expected to order an investigation into alleged profiteering by the "Big Six".
Meanwhile, the Daily Express celebrates "cheaper energy bills for millions" after power firm SSE announced it would freeze costs until 2016. The paper says the move has raised hopes of a price war between the Big Six.
Gwyneth Paltrow's separation from Coldplay singer Chris Martin is still making headlines. The Daily Star prints a photo of the actress kissing an ex-partner in public and suggests the moment could have been behind the split.
"Out in the Coldplay," is the Sun's front page headline. It claims to have "secrets" of the stars' split, saying that Martin was "frozen out" of the relationship, sleeping at a friend's flat, while Paltrow became "close" to five men.
However, the Daily Mirror quotes "sources close to the US actress" as saying Paltrow branded rumours of three affairs as "ridiculous". The paper quotes Martin's family as saying there is "no bad blood" between the pair.
David Cameron faces pressure from some Tories to expel jobless EU migrants, after Germany adopted a similar measure, says the Times. Its main image is of Lib Dem Nick Clegg and UKIP's Nigel Farage debating Britain's EU membership.
The i leads on the debate, which was broadcast by LBC radio and Sky TV, saying a snap poll had handed victory to Mr Farage, despite him being accused of "scaring people" over immigration by the Lib Dem leader.
The Independent claims to have uncovered details of a second secret internal Metropolitan Police probe which, it says, found dozens of rogue detectives in the employ of organised crime gangs.
The Guardian reports "failings" in the police's response to domestic abuse, citing a watchdog's report accusing some officers of a "lack of empathy" and saying many victims are not being taken seriously.
The Daily Mail interprets comments from Office for Budget Responsibility chief Robert Chote to MPs about rising house prices as "official" confirmation that the UK is on the verge of a "dangerous housing bubble".
Media news leads the Financial Times, which suggests that Lachlan Murdoch is in "pole position" to take over his father Rupert's media empire - comprising News Corp and 21st Century Fox - after returning as non-executive co-chairman.
Ofgem is expected to refer the energy sector to the Competition and Markets Authority over claims of profiteering, says the paper.
Still, the Daily Express hails good news for householders after one firm, SSE, froze prices until 2016. Its front page predicts "cheaper energy bills for millions" and raises the prospect of a price war among the "big six" suppliers.
The Daily Mail, however, points out there are "already many cheaper deals available which last for even longer". According to the Daily Mirror, Labour leader Ed Miliband can feel "vindicated" because the development proves that suggestions his energy price freeze plan would lead to economic ruin were "scaremongering nonsense".
But the Daily Telegraph argues that there is a gulf between Mr Miliband's promises and the "real costs of their implementation".
The Independent notes that the firm is scaling back investment in wind farms and cutting 500 jobs, adding: "If we needed evidence that there is no quick and painless fix to the problem of high energy prices, SSE has just proved it."
The paper suggests it's no coincidence that SSE acted ahead of the expected competition inquiry. This review, says the Financial Times, should offer an "opportunity for a detached assessment of the charges laid by politicians. Mr Miliband and others have after all failed to produce compelling evidence to back their claims of profiteering".
Split decision?
Sketchwriters were dispatched to sample the atmosphere at the debate between UKIP's Nigel Farage and Lib Dem Nick Clegg over Britain's EU membership.
"Nigel Farage shone," says the Telegraph's Michael Deacon, adding that he meant his skin, rather than his performance: "A sign of righteous conviction? Or nerves?" The Independent's Donald MacIntyre contrasts Mr Clegg, a "conventional politician", with his opponent who "may be at heart steeped in 1950s nostalgia but is a good deal more post-modern about the facts".
And the Guardian's Esther Addley asks: "Weren't there a couple of conspicuous figures missing: the leaders of the only two parties that have any possible chance of forming a government that could actually do something about Britain's position in Europe?"
So who won?
"Farage bashes Clegg," is the Express's verdict, while the Times offers marks out of five in categories such as key arguments, best statistics, funniest jokes and screen appeal, before awarding the contest to the UKIP leader by a point. The Mirror scores it the other way by the same margin.
The Telegraph asks four writers to give their verdicts, with three handing victory to Mr Clegg and one undecided. A snap poll of people who matter - the voting public - awarded the contest to Mr Farage, by 57% to 36%. However, the YouGov poll - for the Sun - showed both leaders enjoyed a ratings boost as a result of the debate, with an increase percentage of respondents saying they had a positive impression of them afterwards.
Many column inches are dedicated to the separation of Coldplay frontman Chris Martin from actress Gwyneth Paltrow. And while the tabloids speculate about the background to the split, the Times notes that the pair have begun their new lives apart "together, with a family holiday in the Bahamas".
However, it's their description of a "conscious uncoupling" that provokes most comment. And there is little sympathy in evidence.
"Most people reading that will be consciously vomiting," suggests the Daily Star. The Daily Mail's Jan Moir agrees that it's "sickly, self-serving twaddle", describing the phrase as: "An irony-free chunk of classic Paltrow pretentiousness.... Being 'consciously uncoupled' certainly made breaking up the family home and 'co-parenting' nine-year-old Apple and Moses, seven, seem like something holistic and pure."
Allison Pearson, in the Telegraph, agrees the term is "hilariously precious", suggesting it sounds like "something Percy does to Gordon in Thomas the Tank Engine". But she concludes: "If, in the end, 'conscious uncoupling' is just Californian for 'amicable separation', so what? It's better than a train wreck."
Meanwhile, Martin doesn't emerge unscathed. Setting out five traumas (for the public) caused by the break-up, the Daily Mirror's Polly Hudson describes Coldplay's back catalogue as "dirgey, whiny, mopy and limp", adding: "Chris Martin wrote all that when he was supposedly happily married. Can you imagine how whingey the next Coldplay album will be?"
As though in answer, the Daily Telegraph prints lyrics it describes as "born of a broken heart" from the band's recently-released single, Magic.
There are "no Gwynners" in such a situation, says the Sun, adding: "It's so much sadder than the unconscious coupling after the pub which has launched so many fine relationships."
But Moscow also has control over its neighbour's pod of combat dolphins, reports Roland Oliphant from Simferopol. The unit was trained to locate mines, mark underwater obstacles and detect - or even kill - enemy frogmen in the 1960s, before being inherited by Ukraine after the collapse of the Soviet Union, he explains.
Back in the UK, the Army has unveiled its latest weapon - "a bomb-sniffing dog that is also able to attack the enemy" - reports the Times. The paper says that while the Army has used dogs since before World War One, the 249-strong unit is the first to take on the dual role.
Meanwhile, the Daily Mirror says the Ministry of Defence (MoD) has become embroiled in an animal cruelty row after a freedom of information request revealed that between 2010 and 2012, 115 live pigs had been "strapped into body armour and blown to pieces" for research into battlefield blast injuries.
Animal rights campaigners say it's impossible to justify, while the MoD is quoted as saying the animals were anaesthetised and "humanely culled" afterwards and that some developments cannot be brought about without using animals.
Making people click
Daily Mail: Monster 15-inch rat terrorises Swedish family after chewing through CONCRETE wall to make its home in their kitchen
The UN General Assembly has approved a resolution describing the Moscow-backed referendum that led to Russia's annexation of Crimea as illegal.
It comes after the International Monetary Fund (IMF) agreed to a loan deal with Ukraine worth $14-18bn.
The US Congress also passed legislation on Thursday backing a $1bn loan guarantee for Ukraine.
Tensions are high between Russia and the West after pro-Russian troops annexed Ukraine's southern peninsula.
The West has widely condemned the move, with US President Barack Obama warning on Wednesday of "deeper" EU and US sanctions against Russia if it carried out further incursions in Ukraine.
Non-binding
One hundred countries voted in favour of approving a UN General Assembly resolution declaring the Crimean referendum on 16 March illegal and affirming Ukraine's territorial integrity.
Eleven nations voted against, with 58 abstentions.
"This support has come from all corners of the world which shows that this (is) not only a regional matter but a global one,'' Ukraine's Foreign Minister Andriy Deshchytsia told reporters after the vote.
Given that the resolution was non-binding, the vote was largely symbolic, says the BBC's Nick Bryant in New York.
But Ukraine hopes the resolution will act as a deterrent and dissuade Moscow from making further incursions into its territory, he adds.
Diplomats left their seats to photograph electronic monitors displaying the General Assembly vote count
President Obama said the IMF announcement, which would unlock a further $10bn in loans for Ukraine, was a "major step forward" to help stabilise the country's economy and meet the long-term needs of its people.
Speaking after talks with Italian Prime Minister Matteo Renzi in Rome on Thursday, Mr Obama said it was a "concrete signal" that the world stood united with Ukraine at a difficult time.
A bill was also passed in the US Senate and House of Representatives on Thursday providing $1bn in loan guarantees aimed at stabilising Ukraine's economy. The measure still needs to be signed into law by President Obama.
Ukraine's interim Prime Minister Arseniy Yatsenyuk had earlier told parliament the country was on the ""on the edge of economic and financial bankruptcy".
'Door of diplomacy'
Also on Thursday, former Prime Minister Yulia Tymoshenko said she planned to run for president of Ukraine in the elections expected to take place on 25 May.
Ms Tymoshenko, who has already served twice as prime minister and ran for president in 2010, said she would stand as "a candidate for Ukrainian unity".
Yulia Tymoshenko: "I dream about victory... but the victory for Ukraine"
She was released after serving three years in jail on corruption charges, following the ousting of pro-Russian President Viktor Yanukovych in February.
More than 100 people were killed during protests which overthrew pro-Kremlin President Yanukovych in February.
They followed months of street protests sparked by Mr Yanukovych's decision to reject a planned EU trade deal in favour of closer ties with Moscow.
Since then, Russia has annexed the Crimean peninsula, which last week voted to become part of the Russian federation.
Mr Obama said on Thursday that the US hoped Russia would "walk through the door of diplomacy" and resolve the issue in a peaceful way.
Ukraine hopes the UN General Assembly resolution will deter Russia from any future incursion
In other Ukraine developments:
Six Ukrainian military officers detained by Russian troops in Crimea have been released, but five remain in custody; those released include Col Yuli Mamchur, the commander of Belbek base which fell on Saturday
Ukrainian Prime Minister Arseny Yatseniuk says the price Ukraine pays for Russian gas will increase by 79% from 1 April
Russian President Vladimir Putin announces plans for a new domestic payment system to circumvent financial sanctions imposed by Western nations over the Crimea issue.
Closer to pay Julie Gayet over Hollande affair report
Closer magazine reported that President Hollande was having an affair with actress Julie Gayet
A French court has ordered Closer magazine to pay Julie Gayet 15,000 euros (£12,000) over a breach of privacy for revealing her affair with President Francois Hollande.
The magazine published photographs of Mr Hollande and Ms Gayet arriving separately at an apartment in January.
The payout was far lower than the 50,000 euros the actress had sought.
The Paris court ordered the magazine to publish the ruling on the front page of its next edition.
Closer caused a political storm in France on 10 January when it published images purporting to show Mr Hollande and Ms Gayet arriving at a Paris flat for alleged trysts.
Although he refused to comment on the allegations, President Hollande announced that he had "put an end" to his "shared life" with long-term partner Valerie Trierweiler shortly afterwards.
During court hearings, Ms Gayet's lawyer said she had been "hunted" by journalists.
"She was assaulted by swarms of photographers... it was like the hunt of a wild animal," he said.
Closer says it was justified in publishing the images because they raised questions over security
Closer's lawyer maintained that the magazine was justified in publishing the photographs, saying they were in the public interest because they raised questions about Mr Hollande's "duty of transparency".
Ms Gayet has also filed two criminal complaints: one for a breach of privacy over photographs taken of her inside a car and another accusing paparazzi of "endangering others" while chasing her.
The mother of two, who has acted in more than 70 films over a 20-year career, has kept a low profile since the scandal broke.
During a rare public appearance in New York earlier this month she fended off questions about her relationship with President Hollande, saying: "My private life is my private life."