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Aron Moscona, Discoverer of Cadherins, Dies

Aron Arthur Moscona, a developmental biologist who taught at the University of Chicago, has died at the age of 87. Moscana's work in the late 1950s to the early 1970s determined how cells in the developing embryo find each other and interact. His work led to the discovery of cadherins, cell surface molecules that allow cells to recognize and interact with one another. "It allowed other scientists ... to explore the processes by which blood cells leave the bone marrow to circulate, sperm and eggs free themselves, and skin cells cross gaps to close a wound," says an article in the New York Times.

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.