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.
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.  
Podcast: The John Batchelor Show
Published On: Sun Feb 08 2026
Description: 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.