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Jerry Yang Dies

Stem cell scientist Xiangzhong "Jerry" Yang, who cloned the first farm animal in the United States, died of cancer last week. He was 49. Yang directed the University of Connecticut's Center for Regenerative Biology and, in 1999, a Holstein called Amy that Yang cloned was born. "Jerry was one of the greatest scientists and cloning pioneers of our time," Robert Lanza, chief science officer at Advanced Cell Technology of Worcester, told the Hartford Courant.

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.