Synopsis

In the third episode, Iain explores the surprising power of a single plant: grass. Across the South African savannah, he witnesses how it ignites wildfires as a defense against encroaching forests. He demonstrates how even a simple cut from a blade of grass reveals its profound influence on the evolution of life in the oceans. In Senegal, he encounters the most intelligent chimpanzees known to exist. And, amidst the remnants of Earth’s oldest temple, he recounts the remarkable story of how grass