"It has been a long-standing challege for to construct a theory of quantum gravity. String theory is the leading candi…"

"In most situations, the contradictory requirements of quantum mechanics and general relativity are not a problem, bec…"

"Interestingly, both quantum entanglement and s date back to two articles written by Albert Einstein and his collabora…"

"... spacetime as a concept leads to some … where the equations fail. This happens in the interiors of the black holes…"

"The West, at bottom, is a form of society, rather than an area. It is the term applied to the region whose social con…"

"American democracy was born of no theorist's dream; it was not carried in the Sarah Constant to Virginia, nor in the …"

"Manifest Destiny and imperialism were traps into which the nation was led in 1846 and in 1899, and from which it extr…"

"With the age-old goal of universal prosperity within sight, we must question whether the methods—technological values…"

"Perhaps it is symbolic that Brook Farm, initially the most American of our Utopian communities, perished in a holocau…"

"Is it that we think the brain too small a place to hold more than one language at a time? That room for Spanish or Na…"