Amid concerns over the new coronavirus, even the world's supposedly oldest profession is suffering a sudden slump.
German police have searched dozens of sites linked to a mosque frequented by the Berlin market attacker Anis Amri.
Weeklong meeting aimed at spelling out what options the world has if it wants to prevent catastrophic global warming.
The European Space Agency is planning to land an unmanned spacecraft on a comet in an unprecedented, tricky mission.
Theories about when the last Neanderthals walked the Earth may have to be revised, a study suggests.
Cities in Iran, India, Pakistan and the capital of Mongolia rank among the worst on the planet for air pollution, according to a WHO survey.
One of the very pillars of physics and Einstein's theory of relativity - that nothing can go faster than the speed of light - has been rocked by new findings.
Osama bin Laden would have chosen death over capture, the al-Qaeda chief's former sister-in-law has said.