Exploring the caves of the world's biggest iceberg

Sporting Witness

In 2000, a Canadian diver became the first person to explore the underwater caves of a giant iceberg.

Jill Heinerth was already renowned for her exploits mapping vast underground cave networks in Florida.

But when a vast iceberg known as B-15 broke away from an ice shelf in Antarctica, Jill was given a unique challenge.

Braving sub-zero temperatures and the treachery of constantly shifting ice, she became the first person to ever enter one of these caves - a historic milestone in diving.

She spoke to Emily Finch in 2022. A Whistledown production.

Eye-witness accounts brought to life by archive and testimony. Sporting Witness is for those fascinated by sporting history. We take you to the events that have shaped the sports world through the eyes of the people who were there. For nine minutes, you become a fan in the stands as we take you back in time to examine memorable victories and agonising defeats from all over the world. You’ll hear from people who have achieved sporting immortality, or those who were there as incredible sporting moments unfolded.

Recent episodes explore the forgotten football Women’s World Cup, the plasterer who fought a boxing legend, international football’s biggest ever beating and the man who swam the Amazon river. We look at the lives of some of the most famous F1 drivers, tennis players and athletes as well as people who’ve had ground-breaking impact in their chosen sporting field, including: the most decorated Paralympian, the woman who was the number 1 squash player in the world for nine years, and the first figure skater to wear a hijab. You can learn all about fascinating and surprising stories, such as the tennis player who escaped the Nazis, how a man finally beat a horse in a race, and how the FIFA computer game was created.

(Photo: Jill Heinerth. Credit: Getty Images)