TED-Ed: How many universes are there? - Chris Anderson

The video explores the vastness of the universe, starting with the scale of Earth, the Sun, and the Milky Way. It discusses the expansion of space and the implications of this on our understanding of the universe. The concept of a multiverse is introduced through string theory, suggesting countless possible universes. The video also delves into the idea of infinity and the complexities of quantum theory, which may imply the existence of parallel universes. Finally, it presents various perspectives on the nature of the universe, highlighting the ongoing debate among scientists and philosophers.

How many stars are estimated to be in the Milky Way galaxy?

• 100 million

• 400 billion

• 1 trillion

• 10 billion

What does string theory suggest about the nature of the universe?

• There is only one universe.

• The universe is flat.

• The universe is shrinking.

• There are multiple universes with different properties.

According to some physicists, how many universes could the multiverse contain?

• 10 to the 50

• 10 to the 1000

• 10 to the 500

• 10 to the 100

What does quantum theory suggest about the existence of parallel universes?

• Parallel universes are impossible.

• Parallel universes are spawned every moment.

• Parallel universes are identical to ours.

• Parallel universes are visible to us.

What is the philosophical perspective on the nature of our universe?

• Our universe is infinite.

• Our universe is an illusion.

• Our universe is shrinking.

• Our universe is the only reality.