Scientists at Oxford University in the UK now think that kissing evolved more than 21 million years ago, and it wasn’t humans that started it.

As a behaviour, it has no obvious survival or reproductive benefits but it’s seen across the world, in humans and animals alike.

Victoria Gill, our Science Correspondent, tells us all about the research and what we know about if animals can be romantic like humans can.

Instagram: @bbcwhatintheworld Email: whatintheworld@bbc.co.uk WhatsApp: +44 330 12 33 22 6 Presenter: Hannah Gelbart Producers: Emily Horler and Benita Barden Editor: Verity Wilde

The 74th Miss Universe pageant is happening in Bangkok, Thailand this week, and there’s been a lot of drama before a single contestant has taken to the stage.

Walkouts, resignations and Instagram-post apologies. Miss Jamaica falling off the stage. Some judges resigning, one over claims the competition is rigged - which is of course denied by the Miss Universe Organisation.

Social media has shown some of the drama behind the scenes… and at the centre of it is two of the men running the pageant. Nawat Itsaragrisil and Raúl Rocha Cantú have very different visions for the future of the pageant, which has been dealing with declining ratings and financial issues.

William Lee Adams, host of Marketplace Morning Report, takes us through what’s been going on behind the scenes, everything from finances to clashes over how it should be run.

Instagram: @bbcwhatintheworld Email: whatintheworld@bbc.co.uk WhatsApp: +44 330 12 33 22 6 Presenter: Hannah Gelbart Producers: Benita Barden, Chelsea Coates and Emily Horler Video producer: Baldeep Chahal Editor: Verity Wilde

After months of mounting pressure, US lawmakers have just voted to release all of the so-called Epstein files. So documents from criminal investigations into the sex offender Jeffrey Epstein before his death could soon be made public. The vote was passed in the House of Representatives 427-1 and the Senate unanimously fast-tracked it without a formal vote. Now it’s down to US President Donald Trump, who’s already said he’ll release them.

This story has been around for a while, and it’s become a bit of a thorny issue for the US president. Trump used to socialise with Epstein, although there are no allegations of wrongdoing against him. During his re-election campaign, Trump called for the Epstein files to be released. Then, once in power, he changed his mind. But, after a rebellion from some in his own party, he switched sides again, calling for their release.

Following this vote, lots of people have questions: When will the Epstein files be released? What are the Epstein files? And who’s in them? In this episode we explain everything we know so far.

Instagram: @bbcwhatintheworld Email: whatintheworld@bbc.co.uk WhatsApp: +44 330 12 33 22 6 Presenter: Hannah Gelbart Producers: Mora Morrison and Imogen James Editor: Verity Wilde