Tree of life

Taxonomy and the Tree of Life

The science of taxonomy and where humans fit into the tree of life

Species

What a species is and isn't. Ligers, tiglons, mule, hinnies, and dogs

Bacteria

Introduction to bacteria

Viruses

Introduction to viruses

Human Prehistory 101: Prologue

Award winning video introduces human prehistory starting over 200,000 years ago. Who were our first human ancestors? Where did they live?

Human Prehistory 101 Part 1: Out of (Eastern) Africa

Second in a series of videos that introduces human prehistory, this video describes how our human ancestors spread throughout Africa and then into other regions such as Australia and Europe. How did they reach Australia so early on? What happened when our ancestors encountered Neanderthals?

Human Prehistory 101 Part 2: Weathering The Storm

Third in a series of videos that introduces human prehistory, this video describes how early humans continued to defy the odds and populated the Americas during the last ice age.