Michio Kaku, famed theoretical physicist and founder of string field theory, looks at the connection between String Theory and time.

Michio Kaku, famed theoretical physicist and founder of string field theory, explains the theory of everything.

Former NASA Astronaut Kathryn Sullivan, the first American woman to walk in space, describes the excitement of real-world science beyond the classroom.

Michio Kaku, famed theoretical physicist and founder of string field theory, examines the scientific powerhouses of the 20th century and how the U.S. is falling behind.

Lisa Randall, theoretical physicist and leading particle and cosmology expert, theorizes on why some individuals don't base their understanding on science.

Michio Kaku, famed theoretical physicist and founder of string field theory, relates his love for Saturday morning television and its impact on his professional life.