episode description
Physicists can't see it and don’t know much about what it is, but dark energy makes up 70% of the universe. Meet one of the world's leading scientists trying to understand dark energy and the role it plays in causing our universe to expand. What happens when something explodes? Find out how scientists are getting their first glimpse of the microscopic properties of an explosion. We all rely on the water cycle, but how does it really work? Scientists in the United States are embarking on a new project to understand how global warming is affecting our fresh water supply. By tracking individual raindrops they hope to discover how it moves through the watershed. Meet Erin Malone, a photographer that captures the natural world with the simplest technology: a pin-hole camera.
