From the number of women in space and transistors on a chip to social media usage -we’re taking a look back the key numerical moments of 2025. We explore the woes of a big infrastructure projects. Plus, just how can you make sure your New Year’s Resolutions are successful? We’ve got statistics to help.

Presenter: Tim Harford Reporter: Lizzy McNeil Producers: Charlotte McDonald and Katie Solleveld Production Coordinator: Maria Ogundele Sound Mix: Neil Churchill Editor: Richard Vadon