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In a report published online in advance in Science this week, University of Cambridge's Eric Miska and his colleagues discuss the roles of piwi-interacting RNAs in Caenorhabditis elegans. "Our data suggest that nematode piRNA clusters are evolving to generate piRNAs against active mobile elements," Miska et al. write. "Thus, piRNAs provide heritable, sequence-specific triggers for RNAi in C. elegans."

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According to the Washington Post, the Biden Administration is set to make changes to federal restrictions on fetal tissue research.

NPR reports that researchers have developed chimeric embryos as part of work toward growing human organs in animals for organ transplants.

In Science this week: approach to isolated trace DNA from archaic humans from sediments, and more.

Texas Monthly looks into the DNA Zoo being collected by Baylor College of Medicine researchers.