Voices Ice forms on the shore of the East River due to unusually low temperatures caused by a polar vortex in New York

All 50 US states are below freezing as the polar vortex sworls around North America, shattering temperature records and causing a collective shudder across the continent.

Wanted: new chief of staff to run the White House – and get on with Obama

On the cusp of what promises to be a tough re-election year, Barack Obama yesterday confirmed his most senior aide, White House Chief of Staff Bill Daley, is stepping down early after a relatively brief, but often scratchy, 12 month in the post.

Gil Scott-Heron performs in California in 2010

Godfather of rap's last words: Exclusive extract from Gil Scott-Heron’s posthumous memoir

Next month, the visionary poet, rap/hip-hop pioneer, and author Gil Scott-Heron will be honoured with a Special Merit Award at the Grammys. Here is an exclusive extract from his forthcoming memoir, The Last Holiday

'This stuff is marvellous': Chamberlain in his Shelter Island studio last year

John Chamberlain: Sculptor who gave new life to scrap-heap cars

John Chamberlain was a sculptor who experimented with many techniques and materials over his half-century career as an artist. But his signature pieces remain the numerous sculptures made of metal from old cars. With titles such as Glove-Box Collision, Spark Plug Staccato and Fly Wheel Sonata, these colourful and imposing works give a new and enduring life to material from vehicles which have been consigned to the scrap-heap.

Richard Wolffe: Mitt Romney's underwhelming performance does not fully explain Iowa's extraordinary three-way split

You can't blame Mitt Romney. It may be easy to be beastly to the unloved Republican presidential frontrunner. He may well look like "the guy who laid you off," as one former conservative rival quipped. He may well have spent the last four years and as many millions (with the help of anonymous supporters) going nowhere in Iowa: he gained almost exactly the same number of votes yesterday as he did in 2008.

The Obama campaign has not officially begun, but the re-election headquarters in Chicago is buzzing, with 200 workers on board

Inside Obama's Chicago machine

As the Republican primaries get under way, David Usborne is granted exclusive access to the crack team in the President's home town who hope to neutralise the enemy and return their man to the White House

Supertall: the Shanghai World Financial Centre, the world's fourth tallest building at 492m

Skyscrapers: Inside the power of the tower

A meeting of wealth and innovation – the skyscraper is the defining symbol of our age. A new book dissects the workings of our megatowers. Will Dean meets its author

Rappers' snaps hit bum note

An American attempt to smooth relations with Pakistan using hip-hop diplomacy unravelled yesterday when the Pakistani military briefly detained a music group accused of taking photographs of sensitive installations.

Wilco, Roundhouse, London

The masters of reinvention are still inspiring a whole lot of love

Album: Sharon Jones & the Dap-Kings, Soul Time! (Daptone)

Soul Time! is a near-perfect expression of retro-soul style that grips from its opening bars.

'Too thin to conceive' women warned

Being too thin can be just as damaging as being too fat when it comes to getting pregnant, according to new research.

Album: Tom Waits, Bad As Me (Anti-)

On what is inarguably Tom Waits's best album since Rain Dogs a quarter of a century ago, he strolls assuredly across the landscape of American music, turning his hand with equal facility to an extraordinary range of styles, and managing to invent one or two of his own along the way. It must be wonderful to exercise such protean command over one's art, and it's immensely satisfying to witness it wielded by a musician of such remorseless integrity.

Charles Percy: Politician hailed early in his career as the Republicans' answer to John F Kennedy

Today, Charles Percy's moderate politics and his readiness to work across the aisle with Democrats would consign him to the Republican Party's outer darkness. Back in the 1960s and early 1970s, however, those views chimed with the liberal mood of the era, and many thought the young Senator from Illinois was destined for the Oval Office.

Dyson lives up to Ryder billing

Simon Dyson. It was the first name on Paul McGinley's teamsheet and the first out of Ian Poulter's mouth when asked who he expected to graduate from this Seve Trophy to next year's Ryder Cup.

David 'Honeyboy' Edwards: Delta bluesman who played with Muddy Waters and Robert Johnson

David "Honeyboy" Edwards was, almost certainly, the last surviving link with the "Golden Age" of the Delta blues. A friend and associate of many of the genre's seminal figures, including the great Robert Johnson, he was a performer of versatility, integrity and power who continued to hold audiences in his thrall into his tenth decade.

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Syrian conflict is the world's first 'climate change war', say scientists, but it won't be the last one

Climate change key in Syrian conflict

And it will trigger more war in future
How I outwitted the Gestapo

How I outwitted the Gestapo

My life as a Jew in wartime Berlin
The nation's favourite animal revealed

The nation's favourite animal revealed

Women like cuddly creatures whilst men like creepy-crawlies
Is this the way to get young people to vote?

Getting young people to vote

From #VOTESELFISH to Bite the Ballot
Poldark star Heida Reed: 'I don't think a single bodice gets ripped'

Poldark star Heida Reed

'I don't think a single bodice gets ripped'
The difference between America and Israel? There isn’t one

The difference between America and Israel? There isn’t one

Netanyahu knows he can get away with anything in America, says Robert Fisk
Families clubbing together to build their own affordable accommodation

Do It Yourself approach to securing a new house

Community land trusts marking a new trend for taking the initiative away from developers
Head of WWF UK: We didn’t send Cameron to the Arctic to see green ideas freeze

David Nussbaum: We didn’t send Cameron to the Arctic to see green ideas freeze

The head of WWF UK remains sanguine despite the Government’s failure to live up to its pledges on the environment
Author Kazuo Ishiguro on being inspired by shoot-outs and samurai

Author Kazuo Ishiguro on being inspired by shoot-outs and samurai

Set in a mythologised 5th-century Britain, ‘The Buried Giant’ is a strange beast
With money, corruption and drugs, this monk fears Buddhism in Thailand is a ‘poisoned fruit’

Money, corruption and drugs

The monk who fears Buddhism in Thailand is a ‘poisoned fruit’
America's first slavery museum established at Django Unchained plantation - 150 years after slavery outlawed

150 years after it was outlawed...

... America's first slavery museum is established in Louisiana
Kelly Clarkson: How I snubbed Simon Cowell and become a Grammy-winning superstar

Kelly Clarkson: How I snubbed Simon Cowell and become a Grammy-winning superstar

The first 'American Idol' winner on how she manages to remain her own woman – Jane Austen fascination and all
Tony Oursler on exploring our uneasy relationship with technology with his new show

You won't believe your eyes

Tony Oursler's new show explores our uneasy relationship with technology. He's one of a growing number of artists with that preoccupation
Ian Herbert: Peter Moores must go. He should never have been brought back to fail again

Moores must go. He should never have been brought back to fail again

The England coach leaves players to find solutions - which makes you wonder where he adds value, says Ian Herbert
War with Isis: Fears that the looming battle for Mosul will unleash 'a million refugees'

The battle for Mosul will unleash 'a million refugees'

Aid agencies prepare for vast exodus following planned Iraqi offensive against the Isis-held city, reports Patrick Cockburn