Word: occurs
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Dates: during 2000-2009
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...have sex the day after her menstrual period ended, it would be another three weeks before her uterine lining was again sloughed off, which is more than enough time for an infection to set in. Because of this constant risk of exposure to disease, menstruation would have to occur much more often than once a month to be an effective defense against infection...
...chicken-pox veterans suffers a reactivation of the bug as an adult, as was the case with my patient in Michigan. Whether the virus, which can lie dormant for decades, resurfaces appears to depend on a lot of things: Age is a risk factor, since most cases occur in people 60 or older. Stress and trauma have been implicated too. So has a weakened immune system - which makes sense. Your body has to work to keep a virus shackled for so long. The University of Texas study also made a persuasive case for the role of genetics, comparing more than...
...York City that will bring together hundreds of leading Americans to plan and lay out a bold blueprint on citizen service. The event will start on the evening of Sept. 11--that solemn anniversary seemed an appropriate time to launch this effort--and the meeting itself will occur the next day, Sept. 12. The summit will also be the first major public event for ServiceNation, a national campaign of more than 100 organizations--ranging from AARP to the National Council of La Raza and Habitat for Humanity--that collectively represent some 100 million Americans. My co-chairs at the summit...
...studying recessive genes. Though the newly identified genes are located in far-flung regions on the 23 human chromosomes, they are related in function: most play a role in learning. These genes are active in creating, reinforcing or modifying synaptic pathways in the brain - physical and biochemical changes that occur when we learn something new. The implication of this work is that autism may fundamentally amount to molecular defects in learning...
...environmental movement. Compared to the instant drama of nuclear war, climate change makes for bad apocalyptic porn, as anyone who saw The Day After Tomorrow knows. Even the worst-case scenarios say that climate change will happen gradually, at least on a human scale. (For climate history, it will occur in the blink of an eye.) Climate crusaders risk being seen as crying wolf should they forecast Armageddon, only to be met instead with a world that remains mostly the same in the short term, especially for the rich - but one that gets inexorably worse, especially for the poor. Global...