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发表于 2011-10-18 07:39:31 |只看该作者 |倒序浏览

Would you like to visit one of the America’s awe-inspiring national parks? Yosemite in
California, perhaps, with its soaring cliffs and cascading waterfalls?
Or something warmer as fall turns into winter here in the northern hemisphere, such as Florida’s Everglades swamp or a southern battlefield site from the US civil war?
You are certainly be welcome, because so far this year, visitation to the nation’s 395 national parks and historic sites about 5% from last year when park attendance declined 7.5 percent from the year before.
Natural parks service officials are a bit perplexed by this, since park visitation usually rises in tough economic times. It’s cheaper than many other vacation options.
But the prolonged length of the economic downturn and continued high gasoline prices have taken their toll. Don’t forget, a lot of visitors who stay in park campgrounds arrive in large campers and recreational vehicles, which are gas guzzlers.
It also been two years since Ken Burns piqued interest in the national parks with an acclaimed documentary film about their history of beauty. And although there is no way to get an actual account, anecdotally park rangers are reporting a considerable drop-off in what is usually one of
the strongest segments of park tourism: Visitors from Europe, where the strength of euro against the dollar had made trips to the US a bargain.
But the euro's value has fallen vis-à-vis the dollar, and combined with the instability of several economies on the continent, it's thought that lots of European families that might have checked out the misty hollows of the Great Smoky Mountains or the flaming sunsets over the Grand Canyon stayed closer to home this year.

The most obvious effect of birth control pill is, well… birth control. But the pill may have subtler effects too. Like influencing which guy a woman goes for, and her satisfaction with him-- in bed and out. So says a study in the journal Proceeding of the Royal Society B.
Researchers quizzed 2500 mothers on the relationship satisfaction. And they found that women who met Mr. Right while on the pill were happier with their partner’s “ daddy credentials ” -- finances, intelligence and so on. But the same women were less satisfied in the sack than non-pill-takers, rating their mates as less sexually adventurous or attractive.
So why the sizzle fizzle? Previous studies suggest women are attracted to men genetically different from themselves --- which ups the odds of a healthy kid--- but on birth control the opposite seems true. So the authors say the pill might interfere with a woman’s innate sense of sexual chemistry.
But the pill has its perks. Women stayed together longer with partners they met while on the pill, and were less likely to want a separation. Either way, this study suggests the pill is more than just birth control. It could be boyfriend control, too.