For China, Edward Snowden's sudden arrival in Hong Kong and his explosive revelations about the extent of US cyber-spying activities around the world are both a boon and a burden, a potential propaganda and intelligence gift, but also a diplomatic dilemma. Beijing has in recent months come in for sustained criticism over its own cyber-spying activities. The US government and private US internet security firms have criticised China for state-sponsored cyber-attacks, targeting everything from US military contractors to corporations in America. Evidence has been produced that purports to show Chinese hackers operating from military facilities targeting US media firms and private companies. US President Barack Obama was sitting down to tell Chinese leader Xi Jinping that US patience had run out and China had to rein in its cyber-spies, just as Edward Snowden's claims that America 's National Security Agency had been collecting vast amounts of information about internet users around the world were gaining attention. What's more, Mr Snowden now says the US was hacking hundreds of targets in Hong Kong and China, including private individuals, academics and students too. China has long said it is a victim of hacking. Here was a contractor for American intelligence who had fled to Hong Kong saying he wanted to expose US "hypocrisy"; China's claims, he said, were true.

The world's largest database of cancer patients is being set up in England in an attempt to revolutionise care, Public Health England has announced. It will collate all the available data on each of the 350,000 new tumors detected in the country each year. The aim is to use the register to help usher in an era of "personalized medicine" that will see treatments matched to the exact type of cancer a patient has. Experts said it was "great news". The old definitions of cancer - breast, prostate, lung - are crumbling. Cancer starts with a mutation that turns a normal cell into one that divides uncontrollably and becomes a tumour. However, huge numbers of mutations can result in cancer and different mutations need different treatments. Research into the genetics of breast cancer means it is now thought of as at least 10 completely separate diseases, each with a different life expectancy and needing a different treatment. The national register will use data from patients at every acute NHS trust as well 11 million historical records. It will eventually track how each sub-type of cancer responds to treatment, which will inform treatment for future patients.

Mr Zuma told parliament he was happy with the progress being made by Mr Mandela after a "difficult few days". The 94-year-old is spending his fifth day in a Pretoria hospital suffering from a recurrent lung infection. Mr Mandela's wife Graca Machel and other family members visited Mr Mandela on Wednesday. Mr Zuma noted that Wednesday was the 49th anniversary of Mr Mandela's being sentenced to life in prison under the apartheid regime. "Our country is a much better place to live in now than it was before 1994 [when Mr Mandela was elected], even though we still have so much work to do," he said. "We urge South Africans and the international community to continue to keep President Mandela and the medical team in their thoughts and prayers," he went on. On Tuesday Mr Zuma had described Mr Mandela's condition as "very serious but stabilised". Mr Zuma said the doctors were doing a "very good job", adding that the former president was a "good fighter". His ex-wife Winnie Madikizela-Mandela and other relatives visited the ailing former leader on Tuesday. Mr Mandela has been in intensive care since he was taken to hospital on Saturday for the third time this year. In December, he spent 18 days undergoing treatment for a lung infection and gallstones. Before being admitted to hospital, Mr Mandela had been ill for some days at his Johannesburg home, with a recurrence of his long-standing lung problems, said a statement from the president's office on Tuesday. He was taken to hospital when his condition worsened at 01:30 on Saturday (23:30 GMT Friday). Widely referred to by his clan name Madiba, Nelson Mandela served as president from 1994 to 1999. He was previously imprisoned for 27 years, and is believed to have suffered damage to his lungs while working in a prison quarry. He contracted tuberculosis in the 1980s while being held in jail on the windswept Robben Island. He retired from public life in 2004 and has been rarely seen at official events since.

http://www.youtube.com/watch?v=VhRwuWp4MQ8

Some researchers say that men can have 'women's brains' and that women can think more like men.
Find out more about 'brain sex' differences by taking the Sex ID test, a series of visual challenges and questions used by psychologists in the BBC One television series Secrets of the Sexes:

• Get a brain sex profile and find out if you think like a man or a woman.
• See if you can gaze into someone's eyes and know what they're thinking.
• Find out why scientists are interested in the length of your fingers.
• See how your results relate to theories about brain sex.

News

Edward Snowden, 29, is described by the paper as an ex-CIA technical assistant, currently employed by defence contractor Booz Allen Hamilton.
The Guardian said his identity was being revealed at his own request.
The recent revelations are that US agencies gathered millions of phone records and monitored internet data.
A spokesman for the Office of the Director of National Intelligence said the matter had now been referred to the Department of Justice as a criminal matter.
The Guardian quotes Mr Snowden as saying he flew to Hong Kong on 20 May, where he holed himself up in a hotel

He told the paper that the extent of US surveillance was "horrifying", adding: "We can plant bugs in machines. Once you go on the network, I can identify your machine. You will never be safe whatever protections you put in place."

He added: "I don't want to live in a society that does these sort of things… I do not want to live in a world where everything I do and say is recorded."
Mr Snowden said he did not believe he had committed a crime: "We have seen enough criminality on the part of government. It is hypocritical to make this allegation against me."
Asked what he thought would happen to him, he replied: "Nothing good."
Mr Snowden said he accepted he could end up in jail. "If they want to get you, over time they will," he said.
He said he also feared the US authorities would "act aggressively against anyone who has known me. That keeps me up at night".
Mr Snowden said he had gone to Hong Kong because of its "strong tradition of free speech".
Hong Kong signed an extradition treaty with the US shortly before the territory returned to Chinese sovereignty in 1997.
However, Beijing can block any extradition if it believes it affects national defence or foreign policy issues.