Iran-Saudi crisis 'most dangerous for decades'

The world's most beautiful places of worship

Saudi-Iran row deepens as calls for restraint grow

Zuckerberg to become IRON MAN as he unveils plans to build robot

Shia Muslims and world leaders condemn Saudi executions

The difference between Shi’a and Sunni explained

Turkey urges calm in Saudi-Iran dispute

ISIS tunnels: How ISIS militants evade airstrikes in Ramadi

Saudi Arabia-Iran row spreads to other nations

Stubborn oversupply through 2016 to curb oil price recovery: poll

Oil prices edge up after volatile session

Oil rises as Saudis cut ties with Iran after embassy attacked

The breathtaking finalists in National Geographic Traveler's photography contest

Malala and Muzoon reunite to proclaim benefits of education

Who ISIS are really scared of – and it's not the West

South Africa's fight club where the only prize is respect

The hippo that’s pretty in pink

US and Russia get differing results in the air over Syria

The Nokia 1200AD range?

The videos on YouTube that people can’t get enough of

Coalition forces kill ISIS leader connected to Paris attack

Migrant crisis: Over one million reach Europe by sea

Turkey’s Erdogan slams pro-Kurdish Demirtas for “provocation and treason”

Chechens charged in Nemtsov murder

Close encounter between U.S. warship and Iranian rocket

Vladimir Putin's right hand man 'injured in gun club blast'

Belgians arrest 2 accused in New Year's terror plot

Syrian army, backed by air strikes, advances toward southern town

Stunned surgeons remove massive hairball from girl's stomach

2015: Tumultuous year of migrants, IS and Putin

Ancient arch of Palmyra to be recreated in Trafalgar Square and Times Square

Stopped at the final hurdle: migrants blocked at Russia-Finland border

New secret ISIS documents reveal truth about terror sex slaves and more

Syrian rebels evacuated under UN deal

ISIS 'will die in 2016'

Boko Haram keeps up Christmas offensive