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Plus, Job Security's Pretty Sweet

It's one of those questions that come up every so often. This time The Scientist asks sociologist Dan Clawson, "Is tenure worth saving?" Clawson describes a study of faculty at his school, the University of Massachusetts, Amherst, which showed that the university lost 250 tenure-track faculty members between 1990 and 2005, while maintaining the same number of students over the time frame. "Our university was being transformed before our very eyes in ways that most of us found destructive," Clawson says. He later adds, "In some sense, the need for tenure is every bit as much there as it always was, but what's changed is the larger economic climate and the economic pressures on universities and colleges."

The Scan

Pig Organ Transplants Considered

The Wall Street Journal reports that the US Food and Drug Administration may soon allow clinical trials that involve transplanting pig organs into humans.

'Poo-Bank' Proposal

Harvard Medical School researchers suggest people should bank stool samples when they are young to transplant when they later develop age-related diseases.

Spurred to Develop Again

New Scientist reports that researchers may have uncovered why about 60 percent of in vitro fertilization embryos stop developing.

Science Papers Examine Breast Milk Cell Populations, Cerebral Cortex Cellular Diversity, Micronesia Population History

In Science this week: unique cell populations found within breast milk, 100 transcriptionally distinct cell populations uncovered in the cerebral cortex, and more.