Nearly 1,800 Brazilian dams are at risk of failure, according to the government. Fixing them is expensive – but ignoring aging dams can have considerable social, economic and environmental costs.
Brazil's new president could clear the way for plans to develop remote areas around the Tapajos River basin over the objections of the indigenous people who live there.
Canada has been considered a human rights champion when it comes to accepting Syrian refugees. So why is it doing next to nothing for those fleeing Venezuela?
At least a dozen countries are supporting the Venezuelan opposition lawmaker Juan Guaidó, who has declared himself Venezuela's legitimate leader while President Maduro rejects calls to resign.
Guinea pigs are a good livestock choice and don't compete with humans for their food.
Maduro, who was sworn in for his second term on Jan. 10, has rigged elections, jailed rivals and plunged Venezuela into crisis. But Trump's proposed 'military option' to remove him remains unpopular.
Brazil's new president – often called the 'Trump of the tropics' for his inflammatory, right-wing rhetoric – won over poorer voters by stoking fear and resentment. Can he make them happy?
A climate scientist has been visiting the same glacier in Peru for years and explains the complex effects its rapid melting is having.
Brazil's president-elect wants to roll back environmental laws, saying they hurt rural growth. But preventing Amazonian deforestation has actually made farmland more productive.
Jair Bolsonaro, a right-wing congressman and former army captain, is Brazil's next president, with 56 percent of votes. Critics see a threat to democracy in his scathing attacks on Brazilian society.
Trump has called Venezuela a 'human tragedy' and threatened invasion while quietly deporting and denying asylum to Venezuelan refugees. His anti-socialist rhetoric may make for good midterm politics.
In Brazil, a record 1,237 black women will stand for office in Sunday's general election. As in the US, their campaigns reflect deep personal concern about rising racism and sexism in politics.
Up to 5,000 refugees flee hunger and chaos in Venezuela each day – a migrant crisis rivaling Syria's. Most arrive to poor South American border cities that are dangerously unprepared for the influx.
The US has meddled in Latin America so much that its influence there is viewed there with deep suspicion.
Forefather of contemporary neoliberalism or violent dictator – Pinochet's complicated legacy in Chile and the world.
A dejected public and a crowded, unpopular field of candidates make for an unhappy election.
As Brazil's black women become more conspicuous and powerful, they are bullied and threatened in social media's modern-day pillory.
Post-conflict processes are often slowed down or even halted by fear. Can Colombia buck the trend?
The longest lunar eclipse this century, and other special features such as Mars looking spectacular will be seen.
What drives the emergence and disappearance of species? By modeling the fundamental processes of evolution and ecology on geographical scales, new research spotlights topography and climatic shifts.