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 were the four elements that ancient Greeks believed made up the universe?

• Earth, Air, Light, Water

• Earth, Air, Fire, Water

• Earth, Wind, Fire, Ice

• Earth, Metal, Fire, Water

Who proposed the idea that everything is made up of tiny, indivisible atoms?

• Democritus

• Aristotle

• Leucippus

• Plato

What percentage of the universe is made up of ordinary matter, according to modern science?

• 27%

• 68%

• 95%

• 5%

What is the term used for the invisible matter that holds galaxies together?

• Black Holes

• Dark Matter

• Antimatter

• Dark Energy

What phenomenon suggests that the universe's expansion is accelerating?

• Redshift of Galaxies

• Dark Energy

• Gravitational Waves

• Cosmic Microwave Background

Which theory predicts new particles that could explain dark matter?

• String Theory

• Quantum Mechanics

• Supersymmetry

• General Relativity

What is the proposed single element in string theory that could explain the universe's diversity?

• A gravitational field

• A vibrating string

• A quantum loop

• A cosmic wave