This clip describes that, during the 16th Century, much of humanity believed that the Earth was the center of the universe, except for one man: Copernicus. Copernicus theorized that the Earth actually revolved around the sun, to scrutiny of the church. Giordano Bruno believed Copernicus and read Lucretius' banned book, which expanded his thinking that the universe was unbounded.
This clip provides information about the Big Bang and how life started. It also states how powerful the Big Bang really was and how it suggests the universe is still expanding because of the kinetic energy from the event.
Will interviews Richard Westbrook, an official with the Environmental Protection Agency (EPA). He has a pessimistic view of the challenges involving climate change and suggests that the climate debate is long over: we're too late. He also mentions some impacts of climate change: mass migrations, food and water shortages, endless wildfires, and massive storms.