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Controversy? What Controversy?

Legislation has been introduced in seven states that would affect how evolution is taught in those states' school systems, reports LiveScience's Robert Roy Britt. One of the latest is in Tennessee where the House of Representatives passed a bill that "if enacted, would require state and local education authorities to assist teachers in helping students 'analyze' and 'critique' the 'scientific strengths and scientific weaknesses' of theories it labels as controversial, including evolution and global warming," according to the AAAS Policy Alert.

"That all sounds great, if there were indeed controversy that needed teaching," says Britt at LiveScience. The Tennessee Science Teachers Association, he adds, calls the bill "unnecessary, anti-scientific, and very likely unconstitutional." Similar bills have been introduced in Florida, Kentucky, Missouri, New Mexico, Oklahoma, and Texas.

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.