An estimated 700 million people visit zoos every year. Some people see these facilities as a great way to teach people about nature and to save species from extinction. Others think they’re cruel and unnecessary. It’s a heated debate. And now, as more and more people are watching animal rescue videos on Instagram and TikTok, it feels like the debate is hotter than ever.

William Lee Adams from the What in the Word team talks us through the history of zoos, including how England's Queen Charlotte (who was featured in Netflix’s Bridgerton) came to have twenty kangaroos, and how zoos have evolved. We also discuss their pro and cons. We hear from Tonya Lander, a biology lecturer at the University of Oxford in the UK, 19 year old animal rights activist Nikita Dhawan, and Delcianna Winders, Director of the Animal Law and Policy Institute at Vermont Law and Graduate School in the US.

Instagram: @bbcwhatintheworld Email: whatintheworld@bbc.co.uk WhatsApp: +44 0330 12 33 22 6 Presenter: Hannah Gelbart Producers: Mora Morrison and Elena Angelides Video Journalist: Adam Chowdhury Editor: Verity Wilde