308K views · 2.2K reactions | Since the dawn of time, two invisible forces, dark matter and dark energy, have been locked in an epic battle for control of the cosmos. At first, dark matter controlled the early universe, helping build stars, galaxies, and the cosmic web. Five billion years later, dark energy became the universe’s most powerful force and will determine the fate of all creation. #HowTheUniverseWorks | Science Channel | Facebook