A US congressman asked scientists if the Red Planet could have been occupied "thousands of years ago".
The six teenagers were taking part in an international robotics competition held in Washington DC.
Children and the elderly are at risk from the country's worst drought since 2001, the UN says.
A lawyer for the family of an Australian woman who was shot dead dismisses officers' "ambush" fears.
As OJ Simpson gets parole, here is a recap of the football hero whose downfall gripped America.
Emirati diplomat Omar Saif Ghobash claims Qatari links to al-Qaeda.
For years the tentacles of the group, run by a one-eyed criminal, ran deep inside Rome's City Hall.
'A prince assaults citizens' is tweeted more than 200,000 times in the Arab world in 24 hours
German citizens and firms are advised that they face risks in Turkey following "arbitrary" arrests.
It's extraordinary so many Indians don't know enough about their new president, said a Dalit writer.
US officials say the move is part of an effort to improve ties with Russia, Bashar al-Assad's ally.
Despacito, the most-streamed song of all time, is banned from state stations over its "sexy" lyrics.
"A lot was said about this, but in the end we played some music," Thom Yorke told fans in Tel Aviv.
A tarot card reader from Girona is hoping to prove she is Dali's only child- and heir.
Research shows Aboriginal people entered Australia up to 18,000 years earlier than thought.
Barbara Weldens collapses mid-concert with one report suggesting she was electrocuted.
Saudi Arabian Airlines says US authorities have lifted restrictions on laptops in cabins at two airports.
Tallinn ditches Russia-based method of measuring heights above sea level, adding up to 24cm to some areas.
The president says the actions of Jeff Sessions over Russia inquiries were "very unfair" to him.
Glenna Duram shot her husband before attempting suicide in a case apparently witnessed by a parrot.
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