Life depends on a narrow band in the electromagnetic spectrum. This is a consequence of the way In which molecules react to radiation, and must hold true not only on earth but elsewhere in the ...

Rowan LeCompte: A Life in Light is available to stream on pbs.org and the free PBS App, available on iPhone, Apple TV, Android TV, Android smartphones, Amazon Fire TV, Amazon Fire Tablet ...

Our circadian rhythm will continue without external cues (scientists who stayed in a cave with no natural light or time pieces found their circadian rhythm still followed a rough 24-hour pattern ...