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A23a: Biography of an Iceberg

Forty years ago A23a, an iceberg twice the size of London broke off from the Antarctic ice shelf and began its journey into the Southern Ocean. As A23a reaches its final chapter, glaciologist Catherine Walker charts the life and death of a megaberg.

An Overcoat Media production.

Available now

27 minutes

Last on

Fri 11 Sep 2026 20:30GMT
BBC Radio 4

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  • Thu 3 Sep 2026 01:32GMT
    BBC World Service
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    BBC Radio 4
  • Fri 11 Sep 2026 20:30GMT
    BBC Radio 4