String theorist S. James Gates speaks eloquently and thoughtfully about how he discovered Einstein’s passion for the problem of racism, and his "capacity for ethical engagement and his scientific creativity."
is a theoretical physicist and John S. Toll Professor of Physics at the University of Maryland. He's written widely on string theory, and has advanced unified field theories of the type first envisioned by Einstein.
is Associate Professor of Science Writing at MIT. He's produced "Einstein Revealed" for NOVA and has authored several books on science and technology, including Einstein in Berlin.