Word: problem
(lookup in dictionary)
(lookup stats)
Dates: all
Sort By: most recent first
(reverse)
...specific stem cells remains nuclear transfer-taking the nucleus from a patient's skin cell and inserting it into an egg that has had its nucleus removed. This hybrid then begins to divide, and within a few days, generates stem cells that are genetically identical to the patient. The problem, however, as Eggan puts it, is that "there are never any extra unfertilized eggs hanging out at IVF clinics." That's because unlike sperm, an egg cannot be frozen without destroying its integrity. Most clinics will fertilize every egg, and freeze them at various stages of development...
...assume that all student activism is bad,” Bok says. “I think it’s a healthy interest in important issues, and if students didn’t pay attention to these issues, you’d have another kind of problem that’s potentially more serious...
...extracurriculars. But I also met with the disciplinary council a few times, for typical teenage nonsense: being out after hours, going to the school clinic when I was enjoying excellent health, et cetera. I nearly failed chemistry and the gym class of drown-proofing fame. I had a mild problem with authority and a real problem with truancy...
Last year, the Harvard skiing team overcame a particularly difficult problem. The alpine team had no coach throughout the entire season and was forced to coach itself...
...That's problem number one. If North Korea ever attacked a U.S. or South Korean base in the South, Pyongyang would be incinerated in response, and the reunification of the peninsula will have begun. Al-Qaeda, however, isn't a country; it's a global terrorist group. It had something of a return address in Afghanistan, but doesn't now. According to U.S. military intelligence, it has cells in more than 70 countries, and at this point there seems to be no lack of radicals from the Islamic world to take the place of al-Qaeda fighters who are killed...