A man sits on a deck over the Rio Carioca, in which scientists discovered a new bacteria, near Guanabara Bay, venue for  the Olympic sailing events in Rio 2016. Photograph: Ricardo Moraes/Reuters.

Water at the sailing venue for Rio 2016, described as filthy by sailors whohave trained there, has been found to contain a “super bacteria” that is r(...)

Lima was never going to save the world. What the UN’s 20th climate change conference (Cop20) was meant to do, however, was to lay firm foundations for(...)

Europe captain Paul McGinley, right, with Rory McIlroy and Graeme McDowell. “I see my role as quite a big one, because we are going into the unknown. With the Ryder Cup captaincy, I knew what I was doing,” said McGinley. Photograph: Cathal Noonan/Inpho

Typical of Paul McGinley really to leave no stone unturned. When Redmond O’Donoghue – the chairman of the Confederation of Golf in Ireland – first co(...)

A man arrested by police in Rio de Janeiro on suspicion of murder has confessed to killing 42 people over the past decade. Photograph: Getty Images

A man arrested by police in Rio de Janeiro on suspicion of murder has confessed to killing 42 people over the past decade, making him potentially one (...)

Irish Museum of Modern Art, where the exhibit, entitled Nas Quebradas, was on display during the summer. Photograph: George Munday/Getty

Traces of asbestos have been found in an exhibit that had been on display at the Irish Museum of Modern Art (Imma). Traces were found in a work(...)

Brazil’s presidential candidates Dilma Rousseff of the Workers Party (left) and Aécio Neves of the Social Democratic Party after their television debate this week. Photograph: Paulo Whitaker/Reuters

A rite of passage among new correspondents in Brazil is to wonder why, in a country where coalitions are inevitable, the Workers Party and the Soci(...)

Brazilian socialist presidential candidate Marina Silva (top centre)  is mobbed as she arrives at the airport in her hometown of Rio Branco, where she will vote in the general elections today. Photograph: Sergio Moraes/Reuters.

Brazilians vote today in the most unpredictable presidential election in decades and the first since the end of an economic boom underpinning the left(...)

Marina Silva, a conservationist and former environment minister, has been named the socialist candidate for the upcoming Brazilian presidential elections. Photograph: Ueslei Marcelino/Reuters

The mixed-race daughter of a poor, illiterate family of Amazonian rubber tappers has been chosen as a Brazilian presidential candidate.Marina Silva, a(...)

Manchester United manager Louis van Gaal expects Marcos Rojo to be a major addition to his squad. Photograph:  Martin Rickett/PA Wire.

Louis van Gaal has made a move to strengthen his much-maligned defence after completing the signing of Argentina international Marcos Rojo from Sport(...)

Manchester United manager Louis van Gaal and Swansea City manager Gary Monk, during the Barclays Premier League match at Old Trafford. Monk has signed Federico Fernandez from Napoli. Photograph: Martin Rickett/PA Wire.

Swansea have announced the signing of Argentina defender Federico Fernandez from Napoli. The Swans stated on their website that Fernandez has signed a(...)