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This is the Global News Podcast from the BBC World Service.

I'm Alex Ritzen and in the early hours of Sunday the 24th of December, these are our main stories.

The UN Special Envoy to Yemen says the warring parties have

agreed to work towards a nationwide ceasefire. Israel says it's interrogating

hundreds of suspected Hamas and Islamic jihad

operatives who've been captured in Gaza.

An anti-war candidate who hoped to challenge Vladimir Putin in Russia's

presidential election next year has been denied registration.

Also in this podcast,

the various populations had acquired genetic differences

through being separated by thick ice.

Scientists in Australia have raised new fears about the collapse of Antarctica's huge Western ice sheet.

A surprising animal study has helped them to draw such conclusions.

Hundreds of thousands of people have died in nine years of fighting between different factions in Yemen in a civil war

which has drawn in neighboring states and further sharpened tensions between them.

The war has also spilled over into attacks on shipping in the Red Sea through which much of the world's oil travels. We'll be hearing from India in a moment about a similar attack off its shores, but the UN Special Envoy for Yemen Hans Grundberg on Saturday

announced that both sides the huth is in the north and the Saudi back

government have committed two steps towards a ceasefire.

The language is cautious and diplomatic,

...