What each of these operas shares is an unimpeachable literary source with a reputation of its own.

ECONOMIST: Contemporary opera

In the realm of the literary arts, Mr. Magill has a field day, zeroing in on Rousseau as the source of our modern literary obsession with sincerity, which the author finds manifest in German and English Romanticism, American Transcendentalism, French Symbolism and other currents that come to look like a tidal wave in favor of finding and flaunting the unvarnished self.

WSJ: Book Review: Sincerity

Until now, the existence of such a device -- which works by splitting light in a way that points to its source -- has only been hinted at in fleeting literary mentions.

ENGADGET: Alt-week 3.9.13: Sunstones, knotted vortices and a zero-g robot