Prehistoric Life Prehistoric Life 
Prehistoric Life 【Life of the Cambrian】Aysheaia – The Shape Was Right From the Start; Only Its Identity Stayed Open
Prehistoric Life 【Life of the Cambrian】Anomalocaris – Described as Three Separate Animals: a Shrimp, a Jellyfish and a Sea Cucumber
Prehistoric Life 【Life of the Proterozoic】The Francevillian Biota – An Argument Over Whether It Was Alive at All, Fought in Chemistry
Prehistoric Life 【Life of the Proterozoic】Dickinsonia – Not a Jellyfish, Not a Worm, Not a Lichen
Prehistoric Life 【Life of the Proterozoic】Spriggina – Symmetrical at a Glance, but the Segments Are Half a Step Off
Prehistoric Life 【Life of the Proterozoic】Cyanobacteria – The Organism Behind the Worst Pollution Event in History
Prehistoric Life 【Life of the Proterozoic】Grypania – Worm Trail, Alga or Bacterium? 120 Years Without an Answer
Prehistoric Life 【Life of the Proterozoic】Kimberella – The Grazing Marks It Left, and Its Claim to Be an Early Mollusk
Prehistoric Life 【Life of the Proterozoic】Charniodiscus – A “Frond” Standing on a Seafloor Beyond the Reach of Light
Prehistoric Life 【Life of the Proterozoic】Tribrachidium – A Three-Fold Body Plan Found Nowhere in Living Animals
Prehistoric Life 【Life of the Proterozoic】Charnia – The Frond in the Rock That Received Wisdom Made Invisible
Prehistoric Life 【Life of the Proterozoic】Cloudina – Earth’s First Shell Already Had Holes in It
Earth Timeline Earth Timeline Series – Index
Earth Timeline 【Earth Timeline 01】The Hadean Eon – An Age With No Surviving Rock
Earth Timeline 【Earth Timeline 02】The Archean Eon – When Traces of Life Began to Appear
Earth Timeline 【Earth Timeline 03-1】The Proterozoic Eon – How the Atmosphere Filled With Oxygen
Earth Timeline 【Earth Timeline 03-2】The Proterozoic Eon – A Planet Frozen to the Equator, and the First Large Life
Earth Timeline 【Earth Timeline 04】The Cambrian Period – When the Blueprints of Animal Bodies Came Together
Earth Timeline 【Earth Timeline 05】The Ordovician Period – Reef-Filled Seas and an Ending Locked in Ice
Earth Timeline 【Earth Timeline 06】The Silurian Period – When Plants Came Ashore
Earth Timeline 【Earth Timeline 07】The Devonian Period – How Fins Became Legs
Earth Timeline 【Earth Timeline 08】The Carboniferous Period – Giant Insects and Oxygen-Rich Forests
Earth Timeline 【Earth Timeline 09-1】The Permian Period – When the Continents Became One
Earth Timeline 【Earth Timeline 09-2】The Permian Period – The Greatest Extinction in History
Earth Timeline 【Earth Timeline 10】The Triassic Period – Filling the Seats Left Empty by Extinction
Earth Timeline 【Earth Timeline 11】The Jurassic Period – When Dinosaurs Took the Lead on Land
Earth Timeline 【Earth Timeline 12-1】The Cretaceous Period – When Flowers Bloomed and Feathers Spread
Earth Timeline 【Earth Timeline 12-2】The Cretaceous Period – The Day the Asteroid Hit
Earth Timeline