Snow blanketing Prospect Park in Brooklyn, in January 2014. Forecasters expect Wednesday’s high temperature to be minus 25 degrees Celsius in Chicago and Minneapolis. Photograph: Todd Heisler/The New York Times

A blast of Arctic-chilled air from the polar vortex brought dangerous, record-setting cold to a wide swath of the eastern United States on Tuesday, s(...)

 Donald Trump: poll-tracking website Real Clear Politics puts Clinton’s lead at almost seven points, 48 per cent to 41 per cent. Photograph: Evan Vucci/AP Photo

Donald Trump’s advantage over Hillary Clinton in some polls after last month’s Republican convention seems light years ago. The damage done to his ca(...)

The humble cockroach could provide the superfood of the future, according to new research. File photograph: Getty Images/iStockphoto

The humble cockroach could provide the superfood of the future. An international group of scientists has discovered that the “milk” produced by a sp(...)

Mark McCloskey: much of his early career was with Denis O’Brien’s Esat Telecom at a time when it was a proving ground for a whole generation of future Irish business leaders.

It all started in hospital, appropriately enough. Recuperating in a four-bed ward after knee surgery, access to the television quickly became an irrit(...)

Donald Trump speaks during a campaign rally at Dubuque Airport in Iowa, on Saturday: the presidential candidate staged a fly-by in his red and black Boeing 757, dubbed “Trump Force One”, before landing. Photograph: Andrew Harrer/Bloomberg

Abraham Sheffield stands in a large function room of the University of Iowa’s university club, cradling his restless 16-week-old son as his other twin(...)

Donald Trump: the US Republican presidential candidate has rekidled his dispute with Fox News.Photograph: Scott Morgan/Reuters

Donald Trump’s supporters in Iowa were unperturbed by the businessman’s decision to skip the seventh Republican debate on Thursday night, before they (...)

Former Alaska governor Sarah Palin endorses Republican presidential candidate Donald Trump during a rally at the Iowa State University in Ames, Iowa. Photograph: Mary Altaffer/AP

A recurring theme among some Republicans in Iowa, the first state to pick presidential nominees in 11 days’ time, is that they are unsure about the pa(...)

David Doyle

The University College Dublin historian David Doyle, who has died aged 70, pioneered the teaching of American and Irish-American history at the univer(...)

 Conservative US Senator Rand Paul announced Tuesday he is running for the Republican Party’s nomination for the 2016 presidential race. Photograph: Mandel Ngan/AFP/Getty Images.

US Sen Rand Paul declared himself a candidate for the Republican nomination for president on Tuesday, aiming to upset the political order in Washingto(...)

“It’s tough when it comes to dating profiles because we want someone who seems like an amazing person, but we also hopefully will have a relationship with this individual, so we want them to exist.”

If you want to succeed at online dating then drop the flash approach and get real.People looking for love online are less attracted to someone who is (...)

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