Niu Lai, a low-budget Chinese animation film about a cow in a dream sequence, is going viral. Released on August 5, it earned less than $1,500 in its first ten days. But then — following snarky comments, bad reviews and widespread mockery by Gen-Z — the film found a larger audience and has now brought in more than $1.6 million dollars.

We speak with William Lee Adams, a BBC culture reporter, and Mengchen Zhang from the BBC’s Global China Unit. They discuss the film’s plot, its rudimentary animation and how bad publicity has helped it go viral at home and abroad. We also hear about the origins of the film, which was made by a mother and son over the course of five years.

Plus: Chinese content creator Marcelo Wang offers his hot take, and Utah-based content creator Cameron Cowley shares three of his favourite “so bad they’re good” films.

Instagram: @bbcwhatintheworld Email: whatintheworld@bbc.co.uk WhatsApp: +44 330 12 33 22 6 Presenter: Iqra Farooq Producers: Benita Barden and William Lee Adams Editors: Verity Wilde

Do you run without a a shirt on ever? Lots of people have opinions on this topic and in some parts of the world it’s something you’re just not allowed to do.

We hear from runners around the world for their take on the decision to run without a shirt one - for both men and women.

And Yijin Shim from BBC Korean tells us about how in South Korea “no shirtless running” signs have been popping up after more runners have been going shirtless in a heatwave.

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

Across social media young women are discussing the "luteal uglies." These are changes in appearance and mood that women experience during the luteal phase of their menstrual cycle. We hear from women in Vietnam, the Philippines, and the UK about the symptoms they experience, from acne and bloating to fatigue and brain fog.

But what’s behind these changes? Dr Helen O'Neill, an associate professor in reproductive and molecular genetics at University College London, explains how changing hormone levels impact women’s bodies and their brains. She also offers some tips and coping strategies.

Instagram: @bbcwhatintheworld Email: whatintheworld@bbc.co.uk WhatsApp: +44 330 12 33 22 6 Presenter: Hannah Gelbart Producers: William Lee Adams and Emma-Louise Amanshia Editors: Verity Wilde