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...very capital projects that could improve performance and safety. Meanwhile, the major U.S. cities that are most dependent on public transit - such as New York, Chicago, Boston, Philadelphia and Washington - receive a progressively smaller percentage of the federal funding that is available. The combination of increased ridership - triggered at least in part by higher gas prices, which are unlikely to drop over the long run - and aging infrastructure "is stressing the transit system to the breaking point," says Goldberg. (See a video from St. Pancras train station in London...
...That, at least, had long been the conventional wisdom, but in recent years, scientists have come to learn that by some measures, the solar system fairly sloshes with water. Mars, we now know, was once as wet as Earth and still harbors ice and perhaps liquid water. The moon is thought to have water locked in permafrost at its poles. Jupiter's moon Europa is probably home to a globe-girdling ocean beneath a thin rind of ice, and its Jovian sisters Callisto and Ganymede appear to be icy and wet too. Now, according to new findings by the Cassini...
...book on Enceladus is by no means closed, and Cassini has two more flybys of the moon scheduled for November. Scientists aren't expecting to find proof of biology there anytime soon - but now, at least, they've got a good reason to look...
...scrapping the one-size-fits-all approach: "There is a common tendency to treat the galaxy of illicit substances as an undifferentiated mass. Different drugs come from different places, attract different consumers, and are associated with different problems ... For example, cannabis is grown in at least 176 countries around the world. It can be grown indoors or outdoors, and is often cultivated in small plots by users themselves ... For most synthetic drugs, the skills needed to access and process the needed chemicals are not widely spread and, consequently, the market tends to favor more organized groups ... In contrast, most...
...regime will move aggressively toward negotiations with the U.S., in order to convey the impression of stability and international legitimacy to its people. If that happens, the Obama Administration may be in position to gain concessions from the Iranians in the area where the Khamenei-Ahmadinejad forces were least willing to negotiate - Iran's nuclear program. "Under the Nuclear Non-Proliferation Treaty, they have to reveal all their nuclear activities, which they haven't done," a senior Administration official told...