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One Place Where Less Is Definitely More

According to recently published work in Nature, the Cancer Genome Atlas has revealed that many tumors are heterogeneous. More mutations might mean more drug targets, says Derek Lowe, but that's not necessarily a good thing, he writes at In the Pipeline. "Just doing the math on the possible interactions of several dozen mutations with a list of possible treatment regimes is enough to make you pause." The biggest challenge for drug discovery will be finding out what all these mutations do and how they interact with one another.

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.