Dr. Michio Kaku always has interesting and provocative things to say from both a scientific and philosophical perspective. In this 4-minute video clip he discusses the affect that Einstein’s attempt at discovering a unified theory of everything had on his life, how that led him into String Theory, and how strings may be the fundamental aspect of the cosmos.
The full one-hour interview with Dr. Kaku can be found here.

Purposeful Universe
The Purposeful Universe seeks to explore and present, through award winning videos, the abundant order in nature that funnels biological systems toward increasing levels of complexity and sophistication—suggesting that human life is the purposeful outcome of a complex, ordered system.