Air travel has become popular. When prices are low, many people like to visit friends in distant cities. Therefore, many flights are filled long in advance.
Not producing any or the desired effect."an ineffectual campaign"(of a person) lacking the ability or qualities to cope with a role or situation."she was neglectful and ineffectual as a parent"
I'll admit it: I don't read a lot of scholarly, scientific journal articles. I keep up with interesting science news via blogs, news articles headlines. News stories can also be a great way for students to select scientific research topics. Sometimes the news is so interesting that I want to know more. My first stop is sometimes the original journal article that the blog post or news story was based on - the original article can provide additional information and additional related sources. But first you need to find it.
rsity, the library might already have a subscription to that journal. Go to your library's place
Second, even though the journal's place might be asking for money, there may be a copy of the article available for free online as the result of the author posting a copy to his/her place. Many publishers grant authors the right to do this, including Science. If it exists, a quick web search for the article title should discover the item. In this case, the article got a lot of news coverage, so a search for the article title pulls up a lot of news sites. But about halfway down the first page of results is a link from the University of Nebraska. Success! A PDF of a post print of this article is available from the University of Nebraska Lincoln Digital Commons. Look for and other government sites) in the search results to find free access places - those might be your best bets.
Explanation: