The United States said on Tuesday it was revoking visas of Saudis involved in the murder of journalist Jamal Khashoggi, as President Donald Trump ridiculed the kingdom's response as "one of the worst cover-ups" in history.

US National Security Advisor John Bolton on Tuesday praised "productive" talks with President Vladimir Putin and other Russian officials despite an earlier announcement by Washington that it would pull out of a Cold War-era nuclear weapons treaty.

Thousands of Honduran migrants heading to the United States -- a caravan President Donald Trump has called an "assault on our country" -- stopped to rest on Tuesday after walking for two days into Mexican territory.

China's President Xi Jinping officially opened the world's longest sea bridge connecting Hong Kong, Macau and mainland China on Tuesday.

President Donald Trump said on Monday the United States is ready to build up its nuclear arsenal after announcing it is abandoning a Cold War-era nuclear treaty, as Russia warned the withdrawal could cripple global security.

A new treatment for a drug-resistant strain of tuberculosis can cure more than 90 percent of sufferers, according to a trial hailed Monday as a "game changer" in the fight against the global killer.

Thirty-five Nobel and top mathematics prize winners have warned British Prime Minister Theresa May and European Commission chief Jean-Claude Juncker that scientific research will suffer a serious setback without a good Brexit deal.

Paul Biya, who has ruled Cameroon since 1982, won a landslide victory on Monday in a controversial presidential election as the government tightened security and gunfire erupted in the country's volatile English-speaking regions.

Only weeks ago, the world’s leading climate scientists warned that global warming by 2˚C would have even worse impacts than previously anticipated. The report of the Intergovernmental Panel on Climate Change called for more rapid decarbonization of the global economy to limit warming to 1.5˚.