Explore climate change on a geologic time scale, and consider recent human impacts on climate and the atmosphere. Created by Big History Project.

Businessman and philanthropist Bill Gates looks towards a future of sustainable energy and worldwide education. Created by Big History Project.

Stone tools, changes in the human skull, and mutant genes: John Shea discusses some of the early evidence we have for collective learning. Created by Big History Project.

The Earth's atmosphere keeps changing, creating an endless cycle of warming, cooling, and recovery. Created by Big History Project.

What was it like for hunter-gathers? What were their favorite foods that they would go the extra mile to get their hands on? How are decisions like that different from the decisions we make today? Created by Big History Project.

n this video, Henry Louis Gates, Jr., explains how three types of genetic tests helped him understand his own family history, and then goes on to explain how these same tests can help scholars reconstruct the past 60,000 years of human migration. Created by Big History Project.

How will resources and opportunity be distributed in the future? American Scholar Henry Louis Gates, Jr. hopes that the advances of technology will benefit everyone. Created by Big History Project.

Exchange multiplies, markets grow, and fossil fuels flow, revolutionizing government and industry. Created by Big History Project.

New elements enabled new possibilities, creating conditions around stars that were just right for making planets. Created by Big History Project.

A closer look at the Goldilocks Conditions for life, and an animated voyage through evolution on Earth. Created by Big History Project.

Geocentric to heliocentric, and beyond. An overview of the major changes in the way people have viewed the Universe. Created by Big History Project.

The evidence left behind by early humans gives us a vivid picture of their lives. Created by Big History Project.

A look at the "comfort zone" humans live in, and the interplay of life and the biosphere. Created by Big History Project.

Learn to use "claim testers" to evaluate information and decide what you believe! Created by Big History Project.

Geologist Walter Alvarez gets to the bottom of a scientific murder mystery. Created by Big History Project.

Explore the Universe before and after the birth of stars and study the extraordinary process of star formation.

Walter Alvarez introduces geology and discusses how the physical features of Earth can tell us about its history. Created by Big History Project.

Eight dramatic transitions drive Big History's 13.8 billion year story. Created by Big History Project.

Earth's 4.6 billion-year history has distinct periods. Geologists use evidence in rock record to classify these. Created by Big History Project.

Kathy Schick defines the role of the anthropologist in understanding our past and present. Created by Big History Project.