Physicist Dr. Brian Greene brings cutting-edge physics to the masses in this mind-expanding discussion. Can time travel actually exist within the laws of physics? Greene, professor at Columbia University and acclaimed author, explores Einstein's revolutionary discoveries and their modern implications for understanding reality. The conversation covers string theory breakthroughs, the nature of time itself, and how recent physics discoveries are reshaping our understanding of the universe. Greene explains complex concepts in accessible terms, revealing how quantum mechanics and relativity theory intersect to create possibilities once relegated to science fiction. The discussion examines parallel universes, dimensional theory, and the fundamental forces that govern existence. From the smallest subatomic particles to the largest cosmic structures, Greene illuminates how modern physics reveals a universe far stranger than common sense suggests. This exploration of 2005 being the International Year of Physics celebrates Einstein's centennial contributions while looking toward future discoveries that may revolutionize human understanding of space, time, and reality itself.