As many as 100 of those killed on a Malaysia Airlines plane that crashed in Ukraine were delegates heading to Australia for a global AIDS conference, unconfirmed reports said.
Soaring carbon emissions will amplify the risk of conflict, hunger, floods and migration this century, the UN's expert panel said Monday in a landmark report on the impact of climate change.
Venezuela President Nicolas Maduro is readying crisis talks to try to defuse a deadly wave of protests that have brought the biggest challenge yet to his government.
The rebel Free Syrian Army said Sunday it had fired Selim Idriss as its military chief, citing the "difficulties faced by the Syrian revolution" in its battle with the regime.
Syria's opposition leader met Russia's top diplomat on Tuesday in a bid to persuade Moscow to pressure Damascus to agree to a transitional government for the war-scarred nation.
Damascus vowed to keep fighting "terrorism" and the opposition insisted President Bashar al-Assad must go, as both sides dug in Tuesday after a date for long-planned peace talks was set.
Switching to e-cigarettes could save millions of smokers' lives, a conference on the increasingly popular devices heard Tuesday, though some experts warned more research on the health effects is needed.
Syria's main opposition grouping said Monday it was willing to attend peace talks on the condition that President Bashar al-Assad transfer power and is excluded from any transition process.
UN-Arab League envoy Lakhdar Brahimi headed for Damascus to seek support for a Syria peace conference, as Russia slammed rebels for threatening those planning to attend the so-called Geneva II talks.
Six Chinese scientists who were banned from a NASA astronomy conference are now welcome to register, resolving an international row over academic discrimination.
International envoy Lakhdar Brahimi begins a Middle East tour Saturday to pave the way for proposed peace talks on Syria, where dozens of people were killed in the latest fighting in Aleppo province.
The US space agency Thursday vowed to reconsider the applications of Chinese scientists who were denied access to a NASA conference on security grounds.
A controversial decision by NASA to bar Chinese scientists from a conference on exoplanets next month was deemed "inaccurate" Tuesday by the US congressman who wrote the law.
Despite public health campaigns, smoking remains the leading avoidable cause of death worldwide, killing almost six million people a year, mostly in low- and middle-income countries.