Name: Is our universe the only universe?
Uploaded: 2012-04-23T15:19:03Z
Duration: 21 min 30 s
Description: Is there more than one universe? In this visually rich, action-packed talk, Brian Greene shows how the unanswered questions of physics (starting with a big one: What caused the Big Bang?) have led to the theory that our own universe is just one of many in the "multiverse."

Is there more than one universe? In this visually rich, action-packed talk, Brian Greene shows how the unanswered questions of physics (starting with a big one: What caused the Big Bang?) have led to the theory that our own universe is just one of many in the "multiverse."

Brian Greene: Is our universe the only universe?

Is our universe the only universe?

The 1990s discovery of the universe's accelerating expansion challenges our understanding, hinting at dark energy's pivotal role.

String theory suggests our universe's unique properties, including dark energy, might stem from the shape of hidden dimensions.

Inflationary cosmology posits our universe is one bubble in a cosmic bubble bath, potentially solving the dark energy mystery.