Jennifer McElwain Discusses the Evolution of Trees on BBC Radio 4
We are delighted to share that Jennifer McElwain, recently appeared on BBC Radio 4’s renowned programme In Our Time.
In the episode, The Evolution of Trees, Professor McElwain joined host Misha Glenny alongside Christopher Berry (Cardiff University) and Bill Baker (Royal Botanic Gardens, Kew) to explore one of the most important innovations in Earth’s history — the evolution of trees.
The discussion examined how the first trees emerged over 400 million years ago and went on to transform the planet by creating new ecosystems, altering the atmosphere, and shaping the landscapes we know today. The programme also explored how tree-like growth forms have evolved multiple times throughout plant history, highlighting the remarkable adaptability of plants.
In Our Time is one of the BBC’s longest-running and most respected radio programmes, bringing together leading experts from around the world to discuss major topics in science, history, culture, and philosophy. We are incredibly proud to see Professor McElwain sharing her expertise with such a broad international audience.
BBC Radio 4 – In Our Time: The Evolution of Trees (4 June 2026)