Republicans say President Obama's executive action on immigration violates the Constitution. This Q&A explores the legal and political questions raised by the move.
For 57 hours in mid November, a squat lander with spindly legs made history as the first spacecraft to visit the nucleus of a comet – sending a wealth of information on the object to solar-system scientists back on Earth.
The centennial of the start of World War I has captured the imagination of Britons and others across Europe. Why has the poppy become a test of patriotism?
HBO and CBS go streaming, leading many to wonder if a la carte options will be the future of TV.
The search for 43 college students who vanished in the southern state of Guerrero, Mexico, has dragged on for more than a month. How the crisis is resolved will have a profound impact on confidence in President Peña Nieto.
Since 2011, the civil war in Syria has been the biggest driver of displaced populations. And renewed strife in Iraq and sectarian tensions in Nigeria have meant refugees on a scale that is taking even experts in the field by surprise.
Pro-democracy protests in Hong Kong turned chaotic this weekend, as police used tear gas on crowds seeking a greater say in the region's governance. But the confrontation has long been in the works.
Britain's three major party leaders vowed to devolve more power to Scotland in the run-up to its independence vote. But why should Scotland have both more say over its own laws and on legislation that affects only the English?
Scotland voted against independence from Britain, but its example nonetheless is inspiring other separatist movements both in Europe and beyond.
Pentagon officials have a mantra when it comes to taking on the Islamic State, also known as ISIS and ISIL: The US military may be able to use American weapons to blunt the advance of IS, but any lasting change will have to come through political reform.
The World Health Organization just warned that Ebola cases could top 20,000, while Nigeria cited its first deadly case outside Lagos.
The two most senior living leaders of Cambodia’s Khmer Rouge regime were convicted today of crimes against humanity, the first major convictions in a marathon war-crimes tribunal. More than 1.7 million people died under the regime.
The ancient religious group, concentrated in Iraq, have been targeted for extermination by the so-called Islamic State that seized a number of towns along the Iraq-Syrian border this week.
For many minors from Honduras, El Salvador, and Guatemala, making a dangerous journey north outweighs the risks of staying behind.
The country stunned WTO negotiators by its last-minute objections to a deal to cut red tape and reduce tariffs.
Israel and Hamas have fought and come to an uneasy cease-fire four times in six years. What makes this round of fighting – and truce talks – different?
Argentina has until midnight July 30 to negotiate a deal with bondholders who rejected a restructuring deal. The unresolved debt is an overhang from the last time Argentina defaulted in 2001.
Israeli police have detained six Jewish suspects in the killing of Muhammed Abu Khudeir after some of the worst street unrest in a decade erupted in East Jerusalem.
Britons are digesting new revelations that the king-in-waiting lobbied government ministers over policies on education, the environment, and healthcare.
A Polish magazine has been publishing recordings of officials' conversations, apparently recorded in Warsaw restaurants. And it's threatening to topple the government.
What began as an operation to bring the teens home has turned into a much wider crackdown on Hamas – and potentially an escalation in violence.
In the twisted calculus of today's presidential election, President Bashar al-Assad will claim legitimacy by getting a smaller percentage of the vote than in years past.
China is embroiled in territorial disputes over an oil rig close to Vietnam and the arrest of Chinese fishermen in the Philippines, alarming its Southeast Asian neighbors.
Today is the deadline for an Israeli-Palestinian peace deal, and the two sides won't even talk to each other. A look at how things went wrong – again – and what the options are now.
The Oklahoma Supreme Court halted two executions over concerns that the state is keeping secrets about its lethal injection drugs. The issue is increasingly urgent for many states.