TED-Ed: Dark matter: The matter we can't see - James Gillies

The video explores the evolution of scientific understanding from ancient Greek theories of four elements to modern concepts of atoms, dark matter, and dark energy. It highlights Leucippus's atomic theory, the discovery of dark matter, and the accelerating expansion of the universe driven by dark energy. The video also touches on supersymmetry and string theory as potential explanations for the universe's composition, emphasizing the small percentage of the universe that is visible and understood.

What are the four basic elements that were believed to make up the universe according to ancient theories?

What was the significant contribution of Leucippus of Miletus to scientific thought?

How do physicists know about the existence of dark matter?

What percentage of the universe is made up of dark energy and dark matter combined?

What is the theory of supersymmetry and how does it relate to dark matter?

What is the concept of a vibrating string in relation to the universe's particles?

How should we feel about our place in the universe according to the text?