quote [ The new definition would define planets based on mass, rather than more ambiguous shape and size characteristics ]

quote [ These asteroids are potentially apocalyptic. ]

quote [ If humans are to return to the moon, space agencies and governments need to figure out the legal, ethical, and practical dimensions of extraterrestrial waste management. ]

quote [ Many bacteria use a whip-like 'flagellum' to move around their environment - away from danger and towards food. New research reveals the molecular machinery behind bacteria's ability to rapidly change direction. ]

quote [ It was a staggeringly simple idea - so simple that more technological pioneers underestimated its genius. ]

quote [ The human bladder is, at the most basic level, a stretchy bag. To fill to capacity?a volume of 400 to 500 milliliters (about 2 cups) of urine in most healthy adults?it must undergo one of the most extreme expansions of any organ in the human body, expanding roughly sixfold from its wrinkled, empty state. ]

quote [ A planet thought to orbit the star 40 Eridani A?host to Mr. Spock's fictional home planet, Vulcan, in the "Star Trek" universe?is really a kind of astronomical illusion caused by the pulses and jitters of the star itself, a new study shows. ]

quote [ The experiment takes so long, two of the people running it died before seeing a drop. ]

quote [ It's unclear what caused the retraction or how many threads have become displaced. ]