During total eclipses of the sun, at least one ancient culture performed mass human sacrifice to placate the gods. While our understanding of these celestial phenomena has grown, the author rediscovers the scientific curiosity they engender.
A variety of high-tech bomb detectors are under study, but certification, cost, and privacy dilemmas could keep them from your local airport.
Water may seem to be everywhere, but for a rising portion of the world´s population, there may soon be hardly a drop to drink -or to use for growing food, supporting industries and cities, and preserving life-giving ecosystems.
A recent photography exhibit goes behind the closed doors of major laboratories to shed fascinating light on the research shaping modern life.