In 1998, the climate scientist Michael Mann published a simple graph shaped like an ice hockey stick: a long straight line which curves suddenly upward at the end. It was based on decades of intrepid work by scientists around the world. But the line held a stark warning. For Michael, notoriety, abuse and a global battle over the reality of climate change followed.

Episode Producer: Ilan Goodman

A series for Radio 4 by BBC Science in Cardiff.

It’s 1973 and the UK is in crisis: runaway inflation, industrial strike action and political turmoil. Unnoticed at the time - in hospitals and front rooms around the country - something odd is happening with the country’s newborns. A higher proportion of boys are being born than ever before in the 20th Century. What was behind this puzzling trend?

Hannah Fry follows one researcher’s obsessive mission to unravel the mystery.

Episode Producer: Ilan Goodman

A series for Radio 4 by BBC Science in Cardiff.

Behind every line on a graph, there lies an extraordinary human story. Mathematician Hannah Fry is here to tell us ten of them.

Uncharted with Hannah Fry will lead us through ten captivating mysteries to reveal the power of numbers behind each one. Along the way we discover the remarkable people who followed the data and unearthed something extraordinary.