NASA | Einstein's Cosmic Speed Limit

The video explores the role of light in understanding the universe, focusing on the Fermi Gamma Ray Space Telescope's observations of two photons traveling across 7 billion light years. These observations challenge existing theories by showing no delay in photon arrival times, suggesting space-time is smooth as per Einstein's predictions. The video discusses the difficulty in unifying relativity and quantum mechanics, and how Fermi's findings eliminate some theories, bringing us closer to a unified theory of everything.

What role do photons play in our understanding of the universe?

What is the significance of the Fermi Gamma Ray Space Telescope in studying high energy mysteries?

How does Einstein's theory of relativity describe the fabric of space and time?

In what way do scientists aim to reconcile relativity and quantum mechanics?

What are the implications of the observed arrival times of gamma rays on our understanding of space and time?

How does the concept of space being 'foamy' challenge traditional views of physics?

What experimental evidence was captured by the Fermi satellite regarding the speed of light?