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Dreamless?

At his blog, Paul Knoepfler says that he sometimes lets himself dream big as a scientist. "The truth is that having a big-time, perhaps way 'out there' goal or even dream is important for both scientists and Science," he writes at the appropriately named blog, Confessions of a Stem Cell Scientist. Knoepfler notes that while those dreams may not come true tomorrow, but that those ideas serve as a starting point to get to that tomorrow. "When science has had its biggest impact it has been through achieving what pretty much everyone said was impossible," he says.

In the video clip below from Real Time with Bill Maher, astrophysicist Neil deGrasse Tyson worries that people, particularly politicians, have stopped dreaming. (HT: PZ Myers at Pharyngula)

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.