Word: problem
(lookup in dictionary)
(lookup stats)
Dates: all
Sort By: most recent first
(reverse)
...handful of theorists already had a better explanation at hand. The giant planets could have formed in a much more sensible location, like Jupiter did, and then migrated inward, establishing a stable orbit there. It all made sense, except for one tiny problem: this same model also suggested that a little world like Earth shouldn't exist at all; it (or more precisely, the moon-size proto-planets that eventually assembled into Earth) should have spiraled into the sun more than 4 billion years ago. A star might not gobble a Jupiter whole when it moves close enough...
...problem," admits Mordecai-Mark Mac Low, an astronomer at New York's American Museum of Natural History. Or, rather, it was a problem - but Mac Low and his collaborators may have solved it. In a paper recently submitted to the Astrophysical Journal, they say that the old, Earth-destroying theory was generally accurate but lacked some key details - ones that both reshape theories about how planets form and, oh yes, allow the planet we know best to exist. (See an illustrated history of Earth...
...These were people in the problem-drinker category," says lead researcher John Cunningham, senior scientist with the Canadian Center on Addiction & Mental Health. He explained that before they used the website, subjects were typically consuming 22 alcoholic drinks per week. "They drink enough to risk health consequences but are not severely dependent...
...website is not for everyone, of course. For those whose problem is so serious that quitting entirely is the only safe route, more intensive treatment - often maintained indefinitely - may be needed. Still, for people on the borderline who don't want to find themselves in that danger zone in a few years, a little Web-based self-awareness may make a very big difference...
...This represents significant progress on a very difficult problem,” said Hartl, whose research also focuses on how gene evolution affects organisms at the molecular level...