Hydrogen: The First Element

All About the Sun

The Black Death

Why Does the Year Start on January 1? (Encore)

New Year's Traditions

The History of Christmas Songs and Christmas Carols

The James Webb Space Telescope (Redux)

The Two-Hour Marathon (Redux)

The Most Dominant Athlete Ever (Redux)

Apollo 18, 19, and 20 (Encore)

Cahokia

Emperor Nero

The London Underground

The History of Pasta

The Eradication of Diseases

Swiss Mercenaries (Encore)

Human Life Expectancy

The Winter Solstice

The Maginot Line

The Last of the Romanovs (Encore)