The manuscript that gave rise to one of science's best-known anecdotes is now online.

Walter Sartory made a fortune in the markets, but it never made him happy and was the motive for his murder, writes Guy Adams

An £18,000-a-year private school is giving specialist maths classes to talented pupils from the state sector. Liz Lightfoot reports on a calculating strategy

The most important thing that happens today is that Liz Truss is confirmed as the candidate for South West Norfolk. Liz is exactly the kind of MP who will enrich the Commons: intelligent, an independent thinker, she doesn't come from a conventional Tory background but is nonetheless a champion of grassroots Conservatives. I hate to think how many good people have been discouraged from political service because of the intrusive public examination she has put up with over recent weeks.

A fictionalised account of the final moments in the life of Alan Turing is to be premiered via The Independent website this weekend.

The Russian poet Joseph Brodsky once described prison as a place where there was not enough Space and far too much Time. Although the hours in a day remain as constant as the turning of the Earth, the pace of time varies according to the biology of every living creature, and changes with age even within our own species. This is an experience puzzled over by philosophers, calculated by mathematicians, and analysed by psychologists. Eva Hoffman, one of our most lucid thinkers, explores cosmology and physiology, neuro-science and the deepest reaches of the unconscious in order to probe the nature of this mysterious dimension.

At just 20, Clay Marzo is already seen as the most talented surfer of his generation. A new film explains how his condition could have given him a unique edge over his competitors. Guy Adams watches in awe

Scientists have been searching for aliens for 50 years, scanning the skies with an ever-more sophisticated array of radio telescopes and computers. Known as Seti, the search marks its half-century this month. Jennifer Armstrong and Andrew Johnson examine its close – and not so close – encounters

A dying mathematician discovers he can play god

Gordon Brown issued an apology to a Second World War code-breaker who committed suicide after being found guilty of gross indecency with another man.

'Logicomix', the story of Bertrand Russell's struggles with philosophy and his sanity, takes the graphic novel into remarkable new territory. John Walsh is gripped

Thousands have signed a Downing Street petition calling for a posthumous apology for the case Alan Turing, who designed a machine that cracked German codes during the Second World War and is considered the father of computing.