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The Microbiome's Role

The gut microbiome may affect mate selection and evolution, reports Carrie Arnold at Scientific American. She notes that a 2010 experiment in Drosophila pseudoobscura found that changing the flies' diets altered their mate choices. More recently, Arnold adds, another study from Seth Bordenstein at Vanderbilt University showed that giving termites antibiotics affected both their gut bacteria and egg production. "Given the importance of the microbiome in human adaptations such as digestion, smell, and the immune system, it would appear very likely that the human microbiome has had an effect on speciation," Bordenstein tells Arnold.

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.