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right of passage.
But now scientists have tracked down the evolutionary origins of kissing,
and it wasn't humans that started it.
I'm Hannah Gelbart.
I'm the host of What in the World, an award-winning daily podcast from the BBC World Service.
Join me to hear where kissing comes from.
Listen wherever you get your BBC podcasts.
Hello and welcome to NewsHour live from the BBC World Service in London.
I'm Rebecca Kesby.
United States President Donald Trump has posted a series of furious messages on social media within the past few hours.
He's described a group of Democrats in Congress as traitors.
The six Democrats, who all formerly served in the military or security services,
released a video aimed at current serving members of the armed forces, saying that, quote, orders.
The lawmakers claim that the Trump administration is pitting the military against the American people,
threatening the Constitution.
Like us, you all swore an oath to protect and defend this Constitution.
Right now, the threats to our Constitution aren't just coming from a barrage,
but from right here at home.
Our laws are clear.