What Was The Earth Like When It Had Rings?

How Did The First Brain Evolve?

How Has Outer Space Shaped Life on Earth?

What Was The First Predator On Earth?

What Was The Earth Like 500 Million Years Ago?

What Caused The Cambrian Explosion?

How Far Back In Earth's History Could You Have Survived?

Were These The First Animals?

Why Did The Earth Totally Freeze For 100 Million Years?

What Was The First Fungus?

What Was The Earth Like 1 Billion Years Ago?

What Was The First Complex Life on Earth?

What Was The "Boring Billion" Really Like?

A Tour of Earth's Ancient Superoceans

A Tour of Earth's Ancient Supercontinents

What Was The Earth Like 2 Billion Years Ago?

History of the Universe Channel Trailer

What Is The Other 99.99% Of Life?

What Was The First Virus?

What Would The Earth Be Like Without Photosynthesis?

How Did Life Recover From The First Mass Extinction?

How Bad Was The Great Oxidation Event?

What Was Earth Like 3 Billion Years Ago?

How The Earth Got Its Magnetic Field (And Why It Might Not Protect Us Much Longer)

What is the Oldest Fossil on Earth?

What Would The Earth Have Been Like Without Life?

Did Life on Earth Come From Outer Space?

Were Volcanoes The Key To Life?

What Was The Last Common Ancestor of all Life on Earth?

How Did Life Begin?