General relativity is the cornerstone of cosmology and astrophysics. It has also provided the conceptual basis for string theory and other attempts to unify all the forces of nature in terms of geometrical structures.
“Few progressives would take issue with the argument that, significant accomplishments notwithstanding, the Obama presidency has been a big disappointment.”
“It sounds like something from a Woody Guthrie song, but it's true; I was raised in a freight car.”