S8 Ep430: Thomas Halliday describes the Devonian when plants and fungi formed symbiotic root systems to colonize land alongside the giant lichen Prototaxites, then visits Silurian deep-sea hydrothermal vents where life may have originated.

Thomas Halliday describes the Devonian when plants and fungi formed symbiotic root systems to colonize land alongside the giant lichen Prototaxites, then visits Silurian deep-sea hydrothermal vents where life may have originated.